// https://forum.arduino.cc/t/serial-monitor-wont-display-loop-statements/1437266/

//
#include <DS3231.h>
DS3231  rtc(SDA, SCL);
Time t;
//*****************************************************
#include <OneWire.h>
#include <math.h>
#include <DallasTemperature.h>
OneWire  ds(60);
int digOne = 0, digTwo = 0, digThree = 0, digFour = 0;
int digFive = 0;
//******************************************************
//      Use convention of N1N2N2N4 (reading the Nixie tubes left to right in display) and
const int N1B   = 26; //HOURS Tens digit
const int N1C   = 28;
const int N1A   = 22;
const int N1D   = 24;

const int N2B   = 34; //HOURS Ones Digit
const int N2C   = 36;
const int N2A   = 30;
const int N2D   = 32;

const int N3B   = 42; // MINUTES tens digit
const int N3C   = 44;
const int N3A   = 38;
const int N3D   = 40;

const int N4B   = 50; //Minutes ones digit
const int N4C   = 52;
const int N4A   = 46;
const int N4D   = 48;

const int N5B   = 17; //SECONDS ones digit
const int N5C   = 16;
const int N5A   = 19;
const int N5D   = 18;
//
//................Define the pushbutton panel Analog Inputs .................
const int but0 = 62; // Assign variable names of button numbers to inputs.
const int but1 = 63;
const int but2 = 64;
const int but3 = 65;
const int but4 = 66;
const int but5 = 67;
const int but6 = 68;
const int but7 = 69;
//
int but0state = 0; // define a variable to follow if button is being pushed.
int but1state = 0;
int but2state = 0;
int but3state = 0;
int but4state = 0;
int but5state = 0;
int but6state = 0;
int but7state = 0;
//
byte nowHour, nowMinute, nowSecond, nowDow, nowDate;
byte dig1, dig2, dig3, dig4;
byte dig5;
// -----------------------------------------------------------------------------------
void setup(void) {
  pinMode(N1A, OUTPUT); //Least Significant Bit (LSB)
  pinMode(N1B, OUTPUT);
  pinMode(N1C, OUTPUT);
  pinMode(N1D, OUTPUT); //MSB
  //
  pinMode(N2A, OUTPUT); //LSB
  pinMode(N2B, OUTPUT);
  pinMode(N2C, OUTPUT);
  pinMode(N2D, OUTPUT); //MSB
  //
  pinMode(N3A, OUTPUT); //LSB  2**0
  pinMode(N3B, OUTPUT); // 2**1
  pinMode(N3C, OUTPUT); // 2**2
  pinMode(N3D, OUTPUT); //MSB  2**3
  //
  pinMode(N4A, OUTPUT); //LSB
  pinMode(N4B, OUTPUT);
  pinMode(N4C, OUTPUT);
  pinMode(N4D, OUTPUT); //MSB
  //
  pinMode(N5A, OUTPUT); //LSB
  pinMode(N5B, OUTPUT);
  pinMode(N5C, OUTPUT);
  pinMode(N5D, OUTPUT); //MSB
  //
  //
  rtc.begin();
  //
  // The following lines can be uncommented to set the date and time - uncomment - then upload - the uncomment and re-upload.
  rtc.setDOW(THURSDAY);     // Set Day-of-Week to SUNDAY
  rtc.setTime(13, 02, 40);     // (Hr,Mn,Sec) Set the time to 10:58:09 (Use 24hr format when setting time & use no leading 0.)
  rtc.setDate(26, 3, 2026); // Set the date to day,month, year i.e. 31 Dec 2017
  // -----
  Serial.begin(9600);
  delay(1000);
  Serial.println(".................");
  Serial.print("THIS LINE PRINTS FROM SETUP");
  Serial.println(".................");
}
////////////////////////// MAIN PROGRAM LOOP //////////////////////////////////
void loop(void) {
  //  Read the state of the buttons........
  but0state = digitalRead(but0);
  but1state = digitalRead(but1);
  but2state = digitalRead(but2);
  but3state = digitalRead(but3);
  but4state = digitalRead(but4);
  but5state = digitalRead(but5);
  but6state = digitalRead(but6);
  but7state = digitalRead(but7);
  //
  t = rtc.getTime();
  // Send date over serial monitor connection to help trouble shoot the time and program display.
  Serial.println("     ");
  Serial.println("*** START OF DATA ***");
  Serial.print("DATE: ");
  Serial.print(t.date, DEC);
  Serial.print(" ");
  Serial.print(rtc.getMonthStr());
  Serial.print(", ");
  Serial.print(t.year, DEC);
  Serial.println(".");
  Serial.print("Day of Week:");
  Serial.print(t.dow, DEC);
  Serial.print("/7");
  Serial.println(".");
  Serial.print(t.hour, DEC);
  Serial.print(":");
  Serial.print(t.min, DEC);
  Serial.print(":");
  Serial.print(t.sec, DEC);
  Serial.print(" ");
  Serial.println(" ");
  Serial.print("Nix 1 = ");
  Serial.print(dig1);
  Serial.println(" ");
  Serial.print("Nix 2 = ");
  Serial.print(dig2);
  Serial.println(" ");
  Serial.print("Nix 3 = ");
  Serial.print(dig3);
  Serial.println(" ");
  Serial.print("Nix 4 = ");
  Serial.print(dig4);
  Serial.println(" ");
  Serial.print("Nix 5 = ");
  Serial.print(dig5);
  Serial.print(" ");
  Serial.println(" ");
  Serial.println("  ");
  Serial.print(but7state);
  Serial.print(but6state);
  Serial.print(but5state);
  Serial.print(but4state);
  Serial.print(but3state);
  Serial.print(but2state);
  Serial.print(but1state);
  Serial.print(but0state);
  Serial.println("<--- Button States 7 thru 0");
  // Send date over serial monitor connection to help trouble shoot the time and program display.
  //
  byte i;
  byte present = 0;
  byte type_s;
  byte data[12];
  byte addr[8];
  float celsius, fahrenheit;
  if (!ds.search(addr)) {
    Serial.println("No more addresses.");
    Serial.println();
    ds.reset_search();
    delay(250);
    return;
  }
  Serial.print("  ROM =");
  for ( i = 0; i < 8; i++) {
    Serial.write(' ');
    Serial.print(addr[i], HEX);
  }
  if (OneWire::crc8(addr, 7) != addr[7]) {
    Serial.println("CRC is not valid!");
    return;
  }
  Serial.println();
  switch (addr[0]) {
    case 0x10:
      Serial.println("  Chip = DS18S20");  // or old DS1820
      type_s = 1;
      break;
    case 0x28:
      Serial.println("  Chip = DS18B20");
      type_s = 0;
      break;
    case 0x22:
      Serial.println("  Chip = DS1822");
      type_s = 0;
      break;
    default:
      Serial.println("Device is not a DS18x20 family device.");
      return;
  }
  ds.reset();
  ds.select(addr);
  ds.write(0x44, 1);
  delay(1000);
  present = ds.reset();
  ds.select(addr);
  ds.write(0xBE);
  Serial.print("  Data = ");
  Serial.print(present, HEX);
  Serial.print(" ");
  for ( i = 0; i < 9; i++) {
    data[i] = ds.read();
    Serial.print(data[i], HEX);
    Serial.print(" ");
  }
  Serial.print(" CRC=");
  Serial.print(OneWire::crc8(data, 8), HEX);
  Serial.println();
  int16_t raw = (data[1] << 8) | data[0];
  if (type_s) {
    raw = raw << 3; // 9 bit resolution default
    if (data[7] == 0x10) {
      // "count remain" gives full 12 bit resolution
      raw = (raw & 0xFFF0) + 12 - data[6];
    }
  } else {
    byte cfg = (data[4] & 0x60);
    if (cfg == 0x00) raw = raw & ~7;
    else if (cfg == 0x20) raw = raw & ~3;
    else if (cfg == 0x40) raw = raw & ~1;
  }
  celsius = (float)raw / 16.0;
  fahrenheit = celsius * 1.8 + 32.0;
  Serial.print("Temperature = ");
  Serial.print(fahrenheit);
  Serial.print("     ");
  Serial.print(fahrenheit, 1);
  Serial.print("     ");
  int c1 = (fahrenheit + .00) * 10;
  Serial.print(c1);
  Serial.print(" c1 fahrenheit x10 ");
  float temperature = (fahrenheit - 5.50);
  //digOne - Tens
  temperature /= 10;
  digOne = temperature;
  //digTwo - Ones
  temperature = (temperature - digOne) * 10;
  digTwo = temperature;
  //digThree - Decimal
  temperature = (temperature - digTwo) * 10;
  digThree = temperature;
  //digFour - N4Dredths
  temperature = (temperature - digThree) * 10;
  digFour = temperature;
  digFive = nowSecond % 10; //Ones digit of the Seconds
  Serial.print("temper ");
  Serial.println();
  Serial.print("Nix T1 = ");
  Serial.print(digOne);
  Serial.println(" ");
  Serial.print("Nix T2 = ");
  Serial.print(digTwo);
  Serial.println(" ");
  Serial.print("Nix T3 = ");
  Serial.print(digThree);
  Serial.println(" ");
  Serial.print("Nix T4 = ");
  Serial.print(digFour);
  Serial.println(" ");
  Serial.print("Nix T5 = ");
  Serial.print(digFive);
  Serial.println(" ");
  Serial.println(" ^^^^^  END OF DATA   ^^^^^ ");
  DisplayWhat();
  //Now call the routine to drive the Nixie tubes with the correct Chip Driver pattern.
  //
  //DriveTubes();
  byte freq = t.sec;
  if (freq >= 0 && freq <= 12 && but0state != HIGH && but1state != HIGH && but2state != HIGH && but3state != HIGH && but4state != HIGH
      && but5state != HIGH && but6state != HIGH && but7state != HIGH)
  {
    //Display A Full Colon for the time:
    //Top Colon Light
    digitalWrite(7, HIGH);
    //Bottom Colon Point
    digitalWrite(3, HIGH);
    DisplayTime(); //Time
    DriveTubes();
    delay(10);
  }
  else if (freq >= 13 && freq <= 17 && but0state != HIGH && but1state != HIGH && but2state != HIGH && but3state != HIGH && but4state != HIGH
           && but5state != HIGH && but6state != HIGH && but7state != HIGH)
  {
    //Top Colon Light
    digitalWrite(7, LOW);
    //Bottom Colon Point
    digitalWrite(3, HIGH);
    digFive = nowSecond % 10; //Ones digit of the Seconds
    DriveN5();
    DisplayTemp();
    delay(10);
  }
  else if (freq >= 18 && freq <= 27 && but0state != HIGH && but1state != HIGH && but2state != HIGH && but3state != HIGH && but4state != HIGH
           && but5state != HIGH && but6state != HIGH && but7state != HIGH)
  {
    //Top Colon Light
    digitalWrite(7, HIGH);
    //Bottom Colon Point
    digitalWrite(3, HIGH);
    DisplayTime(); //Time
    DriveTubes();
    delay(10);
  }
  else if (freq >= 28 && freq <= 32 && but0state != HIGH && but1state != HIGH && but2state != HIGH && but3state != HIGH && but4state != HIGH
           && but5state != HIGH && but6state != HIGH && but7state != HIGH)
  {
    //Top Colon Light
    digitalWrite(7, LOW);
    //Bottom Colon Point
    digitalWrite(3, HIGH);
    digFive = nowSecond % 10; //Ones digit of the Seconds
    DriveN5();
    DisplayTemp();
    delay(10);
  }
  else if (freq >= 33 && freq <= 42 && but0state != HIGH && but1state != HIGH && but2state != HIGH && but3state != HIGH && but4state != HIGH
           && but5state != HIGH && but6state != HIGH && but7state != HIGH)
  {
    //Top Colon Light
    digitalWrite(7, HIGH);
    //Bottom Colon Point
    digitalWrite(3, HIGH);
    DisplayTime(); //Time
    DriveTubes();
    delay(10);
  }
  else if (freq >= 43 && freq <= 47 && but0state != HIGH && but1state != HIGH && but2state != HIGH && but3state != HIGH && but4state != HIGH
           && but5state != HIGH && but6state != HIGH && but7state != HIGH)
  {
    //Top Colon Light
    digitalWrite(7, LOW);
    //Bottom Colon Point
    digitalWrite(3, HIGH);
    digFive = nowSecond % 10; //Ones digit of the Seconds
    DriveN5();
    DisplayTemp();
    delay(10);
  }
  else if (freq >= 48 && freq <= 49 && but0state != HIGH && but1state != HIGH && but2state != HIGH && but3state != HIGH && but4state != HIGH
           && but5state != HIGH && but6state != HIGH && but7state != HIGH)
  {
    //Top Colon Light
    digitalWrite(7, HIGH);
    //Bottom Colon Point
    digitalWrite(3, HIGH);
    RunPoison();
    delay(10);
  }
  else if (freq >= 50 && freq <= 60 && but0state != HIGH && but1state != HIGH && but2state != HIGH && but3state != HIGH && but4state != HIGH
           && but5state != HIGH && but6state != HIGH && but7state != HIGH)
  {
    //Top Colon Light
    digitalWrite(7, HIGH);
    //Bottom Colon Point
    digitalWrite(3, HIGH);
    DisplayTime();// Time
    DriveTubes();
    delay(10);
  }
}
/////////////////////////////////// SUBROUTINES /////////////////////
void DisplayWhat()
{
  if (but0state == HIGH || but1state == HIGH || but2state == HIGH || but3state == HIGH)
  {
    ChangeTime();
  }
  else if (but4state == HIGH)
  {
    DisplayTemp();
  }
  else if (but5state == HIGH)
  {
    DisplaySec();
  }
  else if (but6state == HIGH)
  {
    DisplayDate();
  }
  else if (but7state == HIGH)
  {
    digitalWrite(3, LOW);  //D1
    digitalWrite(7, LOW); //C1
    //
    RunPoison();
  }
}

void DisplayTime()
{
  t = rtc.getTime();
  nowHour = t.hour;
  nowMinute = t.min;
  nowSecond = t.sec;
  if (nowHour > 12) nowHour = nowHour - 12; // Needed for non-military display
  if (nowHour == 0) nowHour = 12;
  //
  // Strip off the digits for the time to drive each nixie tube independently
  dig1 = nowHour / 10; //First digit of the hour (1 or 0)
  dig2 = nowHour % 10; //Second digit of the hour.
  dig3 = nowMinute / 10; //First digit of the minute (40, 30, 20 etc)
  dig4 = nowMinute % 10; //Second digit of the minute
  dig5 = nowSecond % 10; //Ones digit of the Seconds
  //
  //nowSecond%10; //Ones digit of the seconds counter
  if (dig1 == 0) dig1 = 16; //So that the first digit just won't be lit up at all. driveves ABCD bits all HIGH for no outputs on.
  if (dig3 == 6) dig3 = 0; //So that the first digit just won't be lit up at all.  ABCD drives all LOW = no outputs on chip driver for a 0.
}
//
void DisplaySec()
{
  t = rtc.getTime();
  nowSecond = t.sec;
  //
  // Strip off the digits for the time to drive each nixie tube independently
  dig1 = 0;
  dig2 = 0;
  dig3 = nowSecond / 10; //First digit of the seconds (40, 30, 20 etc)
  dig4 = nowSecond % 10; //Second digit of the Seconds
  //
  DriveTubes();
}
void DisplayDate()
{
  t = rtc.getTime();
  nowDate = t.date;
  nowDow = t.dow;
  //
  // Strip off the digits for the time to drive each nixie tube independently
  dig1 = nowDow / 10; //First digit of the hour (1 or 0)
  dig2 = nowDow % 10; //Second digit of the hour.
  dig3 = nowDate / 10; //First digit of the minute (40, 30, 20 etc)
  dig4 = nowDate % 10; //Second digit of the minute
  //
  DriveTubes();
}

void ChangeTime()
{
  byte prevHour = t.hour;
  byte prevMin = t.min;
  byte prevSec = t.sec;
  int newHour, newMin;
  newHour = prevHour;
  newMin = prevMin;
  if (but0state == HIGH)
  { // Increment the Hour up by 1
    newHour = prevHour + 1;
    DisplayTime();
    DriveTubes();
    if (newHour >= 24)  newHour = 0;
  }
  else if (but1state == HIGH)
  { // Decrement the Hour down by one
    newHour = prevHour - 1;
    DisplayTime();
    DriveTubes();
    if (newHour <= 0) newHour = 23;
  }
  if (but2state == HIGH)
  { // Increment the Minute up by one
    newMin = prevMin + 1;
    DisplayTime();
    DriveTubes();
    if (newMin > 59) newMin = 0;
  }
  else if (but3state == HIGH)
  { // Decrement Minute down by one
    newMin = prevMin - 1;
    DisplayTime();
    DriveTubes();
    if (newMin < 0) newMin = 59;
  }
  rtc.setTime(newHour, newMin, prevSec);
}
//
void RunPoison()
//  Run through the digits on all nixies to prevent cathode poisoning - on Pushbutton 8 only.
//  This code cycles through the digits of a Nixie Tube.
{
  for (int i = 0; i < 10; i++)
  {
    //0
    digitalWrite(N1D, LOW);  //D1 MSB
    digitalWrite(N1C, LOW);  //C1 MSB -1
    digitalWrite(N1B, LOW);  //B1 MSB -2
    digitalWrite(N1A, LOW);  //A1 LSB
    delay(10);
    digitalWrite(N2D, LOW);  //D2
    digitalWrite(N2C, LOW);  //C2
    digitalWrite(N2B, LOW);  //B2
    digitalWrite(N2A, LOW);  //A2
    delay(10);
    digitalWrite(N3D, LOW);  //D3
    digitalWrite(N3C, LOW);  //C3
    digitalWrite(N3B, LOW);  //B3
    digitalWrite(N3A, LOW);  //A3
    delay(10);
    digitalWrite(N4D, LOW);  //D3
    digitalWrite(N4C, LOW);  //C3
    digitalWrite(N4B, LOW);  //B3
    digitalWrite(N4A, LOW);  //A3
    delay(10);
    digitalWrite(N5D, LOW);  //D3
    digitalWrite(N5C, LOW);  //C3
    digitalWrite(N5B, LOW);  //B3
    digitalWrite(N5A, LOW);  //A3
    delay(10);
    //1
    digitalWrite(N1D, LOW);  //D1
    digitalWrite(N1C, LOW);  //C1
    digitalWrite(N1B, LOW);  //B1
    digitalWrite(N1A, HIGH); //A1
    delay(10);
    digitalWrite(N2D, LOW);  //D2
    digitalWrite(N2C, LOW);  //C2
    digitalWrite(N2B, LOW);  //B2
    digitalWrite(N2A, HIGH);  //A2
    delay(10);
    digitalWrite(N3D, LOW);  //D3
    digitalWrite(N3C, LOW);  //C3
    digitalWrite(N3B, LOW);  //B3
    digitalWrite(N3A, HIGH);  //A3
    delay(10);
    digitalWrite(N4D, LOW);  //D3
    digitalWrite(N4C, LOW);  //C3
    digitalWrite(N4B, LOW);  //B3
    digitalWrite(N4A, HIGH);  //A3
    delay(10);
    digitalWrite(N5D, LOW);  //D3
    digitalWrite(N5C, LOW);  //C3
    digitalWrite(N5B, LOW);  //B3
    digitalWrite(N5A, HIGH);  //A3
    delay(10);
    //2
    digitalWrite(N1D, LOW);  //D1
    digitalWrite(N1C, LOW);  //C1
    digitalWrite(N1B, HIGH); //B1
    digitalWrite(N1A, LOW);  //A1
    delay(10);
    digitalWrite(N2D, LOW);  //D2
    digitalWrite(N2C, LOW);  //C2
    digitalWrite(N2B, HIGH);  //B2
    digitalWrite(N2A, LOW);  //A2
    delay(10);
    digitalWrite(N3D, LOW);  //D3
    digitalWrite(N3C, LOW);  //C3
    digitalWrite(N3B, HIGH);  //B3
    digitalWrite(N3A, LOW);  //A3
    delay(10);
    digitalWrite(N4D, LOW);  //D3
    digitalWrite(N4C, LOW);  //C3
    digitalWrite(N4B, HIGH);  //B3
    digitalWrite(N4A, LOW);  //A3
    delay(10);
    digitalWrite(N5D, LOW);  //D3
    digitalWrite(N5C, LOW);  //C3
    digitalWrite(N5B, HIGH);  //B3
    digitalWrite(N5A, LOW);  //A3
    delay(10);
    //3
    digitalWrite(N1D, LOW);  //D1
    digitalWrite(N1C, LOW);  //C1
    digitalWrite(N1B, HIGH); //B1
    digitalWrite(N1A, HIGH); //A1
    delay(10);
    digitalWrite(N2D, LOW);  //D2
    digitalWrite(N2C, LOW);  //C2
    digitalWrite(N2B, HIGH);  //B2
    digitalWrite(N2A, HIGH);  //A2
    delay(10);
    digitalWrite(N3D, LOW);  //D3
    digitalWrite(N3C, LOW);  //C3
    digitalWrite(N3B, HIGH);  //B3
    digitalWrite(N3A, HIGH);  //A3
    delay(10);
    digitalWrite(N4D, LOW);  //D3
    digitalWrite(N4C, LOW);  //C3
    digitalWrite(N4B, HIGH);  //B3
    digitalWrite(N4A, HIGH);  //A3
    delay(10);
    digitalWrite(N5D, LOW);  //D3
    digitalWrite(N5C, LOW);  //C3
    digitalWrite(N5B, HIGH);  //B3
    digitalWrite(N5A, HIGH);  //A3
    delay(10);

    //4
    digitalWrite(N1D, LOW);  //D1
    digitalWrite(N1C, HIGH); //C1
    digitalWrite(N1B, LOW);  //B1
    digitalWrite(N1A, LOW);  //A1
    delay(10);
    digitalWrite(N2D, LOW);  //D2
    digitalWrite(N2C, HIGH);  //C2
    digitalWrite(N2B, LOW);  //B2
    digitalWrite(N2A, LOW);  //A2
    delay(10);
    digitalWrite(N3D, LOW);  //D3
    digitalWrite(N3C, HIGH);  //C3
    digitalWrite(N3B, LOW);  //B3
    digitalWrite(N3A, LOW);  //A3
    delay(10);
    digitalWrite(N4D, LOW);  //D3
    digitalWrite(N4C, HIGH);  //C3
    digitalWrite(N4B, LOW);  //B3
    digitalWrite(N4A, LOW);  //A3
    delay(10);
    digitalWrite(N5D, LOW);  //D3
    digitalWrite(N5C, HIGH);  //C3
    digitalWrite(N5B, LOW);  //B3
    digitalWrite(N5A, LOW);  //A3
    delay(10);

    //5
    digitalWrite(N1D, LOW);  //D1
    digitalWrite(N1C, HIGH); //C1
    digitalWrite(N1B, LOW);  //B1
    digitalWrite(N1A, HIGH); //A1
    delay(10);
    digitalWrite(N2D, LOW);  //D2
    digitalWrite(N2C, HIGH);  //C2
    digitalWrite(N2B, LOW);  //B2
    digitalWrite(N2A, HIGH);  //A2
    delay(10);
    digitalWrite(N3D, LOW);  //D3
    digitalWrite(N3C, HIGH);  //C3
    digitalWrite(N3B, LOW);  //B3
    digitalWrite(N3A, HIGH);  //A3
    delay(10);
    digitalWrite(N4D, LOW);  //D3
    digitalWrite(N4C, HIGH);  //C3
    digitalWrite(N4B, LOW);  //B3
    digitalWrite(N4A, HIGH);  //A3
    delay(10);
    digitalWrite(N5D, LOW);  //D3
    digitalWrite(N5C, HIGH);  //C3
    digitalWrite(N5B, HIGH);  //B3
    digitalWrite(N5A, HIGH);  //A3
    delay(10);

    //6
    digitalWrite(N1D, LOW);  //D1
    digitalWrite(N1C, HIGH); //C1
    digitalWrite(N1B, HIGH); //B1
    digitalWrite(N1A, LOW);  //A1
    delay(10);
    digitalWrite(N2D, LOW);  //D2
    digitalWrite(N2C, HIGH);  //C2
    digitalWrite(N2B, HIGH);  //B2
    digitalWrite(N2A, LOW);  //A2
    delay(10);
    digitalWrite(N3D, LOW);  //D3
    digitalWrite(N3C, HIGH);  //C3
    digitalWrite(N3B, HIGH);  //B3
    digitalWrite(N3A, LOW);  //A3
    delay(10);
    digitalWrite(N4D, LOW);  //D3
    digitalWrite(N4C, HIGH);  //C3
    digitalWrite(N4B, HIGH);  //B3
    digitalWrite(N4A, LOW);  //A3
    delay(10);
    digitalWrite(N5D, LOW);  //D3
    digitalWrite(N5C, HIGH);  //C3
    digitalWrite(N5B, HIGH);  //B3
    digitalWrite(N5A, LOW);  //A3
    delay(10);

    //7
    digitalWrite(N1D, LOW);  //D1
    digitalWrite(N1C, HIGH); //C1
    digitalWrite(N1B, HIGH); //B1
    digitalWrite(N1A, HIGH); //A1
    delay(10);
    digitalWrite(N2D, LOW);  //D2
    digitalWrite(N2C, HIGH);  //C2
    digitalWrite(N2B, HIGH);  //B2
    digitalWrite(N2A, HIGH);  //A2
    delay(10);
    digitalWrite(N3D, LOW);  //D3
    digitalWrite(N3C, HIGH);  //C3
    digitalWrite(N3B, HIGH);  //B3
    digitalWrite(N3A, HIGH);  //A3
    delay(10);
    digitalWrite(N4D, LOW);  //D3
    digitalWrite(N4C, HIGH);  //C3
    digitalWrite(N4B, HIGH);  //B3
    digitalWrite(N4A, HIGH);  //A3
    delay(10);
    digitalWrite(N5D, LOW);  //D3
    digitalWrite(N5C, HIGH);  //C3
    digitalWrite(N5B, HIGH);  //B3
    digitalWrite(N5A, HIGH);  //A3
    delay(10);

    //8
    digitalWrite(N1D, HIGH); //D1
    digitalWrite(N1C, LOW);  //C1
    digitalWrite(N1B, LOW);  //B1
    digitalWrite(N1A, LOW);  //A1
    delay(10);
    digitalWrite(N2D, HIGH);  //D2
    digitalWrite(N2C, LOW);  //C2
    digitalWrite(N2B, LOW);  //B2
    digitalWrite(N2A, LOW);  //A2
    delay(10);
    digitalWrite(N3D, HIGH);  //D3
    digitalWrite(N3C, LOW);  //C3
    digitalWrite(N3B, LOW);  //B3
    digitalWrite(N3A, LOW);  //A3
    delay(10);
    digitalWrite(N4D, HIGH);  //D3
    digitalWrite(N4C, LOW);  //C3
    digitalWrite(N4B, LOW);  //B3
    digitalWrite(N4A, LOW);  //A3
    delay(10);
    digitalWrite(N5D, HIGH);  //D3
    digitalWrite(N5C, LOW);  //C3
    digitalWrite(N5B, LOW);  //B3
    digitalWrite(N5A, LOW);  //A3
    delay(10);

    //9
    digitalWrite(N1D, HIGH); //D1
    digitalWrite(N1C, LOW);  //C1
    digitalWrite(N1B, LOW); //B1
    digitalWrite(N1A, HIGH); //A1
    delay(10);
    digitalWrite(N2D, HIGH);  //D2
    digitalWrite(N2C, LOW);  //C2
    digitalWrite(N2B, LOW);  //B2
    digitalWrite(N2A, HIGH);  //A2
    delay(10);
    digitalWrite(N3D, HIGH);  //D3
    digitalWrite(N3C, LOW);  //C3
    digitalWrite(N3B, LOW);  //B3
    digitalWrite(N3A, HIGH);  //A3
    delay(10);
    digitalWrite(N4D, HIGH);  //D3
    digitalWrite(N4C, LOW);  //C3
    digitalWrite(N4B, LOW);  //B3
    digitalWrite(N4A, HIGH);  //A3
    delay(10);
    digitalWrite(N5D, HIGH);  //D3
    digitalWrite(N5C, LOW);  //C3
    digitalWrite(N5B, LOW);  //B3
    digitalWrite(N5A, HIGH);  //A3
    delay(10);
  }
}
//
//
void DriveTubes() //..............Evaluate and display each nixie tube bit pattern.............................
{
  //  - ----------------------- Display First Nixie Tube Digit N1 --------------

  if (dig1 == 16) // write overflow to turn off all chip outputs and blank out the nixie tube.
  {
    digitalWrite(N1A, HIGH);
    digitalWrite(N1B, HIGH);
    digitalWrite(N1C, HIGH);
    digitalWrite(N1D, HIGH);
  }
  if (dig1 == 0) //write 0000
  {
    digitalWrite(N1A, LOW);
    digitalWrite(N1B, LOW);
    digitalWrite(N1C, LOW);
    digitalWrite(N1D, LOW);
  }
  if (dig1 == 1) //write 0001
  {
    digitalWrite(N1A, HIGH);
    digitalWrite(N1B, LOW);
    digitalWrite(N1C, LOW);
    digitalWrite(N1D, LOW);
  }
  if (dig1 == 2) //write 0010
  {
    digitalWrite(N1A, LOW);
    digitalWrite(N1B, HIGH);
    digitalWrite(N1C, LOW);
    digitalWrite(N1D, LOW);
  }
  if (dig1 == 3) //write 0011
  {
    digitalWrite(N1A, HIGH);
    digitalWrite(N1B, HIGH);
    digitalWrite(N1C, LOW);
    digitalWrite(N1D, LOW);
  }
  if (dig1 == 4) //write 0100
  {
    digitalWrite(N1A, LOW);
    digitalWrite(N1B, LOW);
    digitalWrite(N1C, HIGH);
    digitalWrite(N1D, LOW);
  }
  if (dig1 == 5) //write 0101
  {
    digitalWrite(N1A, HIGH);
    digitalWrite(N1B, LOW);
    digitalWrite(N1C, HIGH);
    digitalWrite(N1D, LOW);
  }
  if (dig1 == 6) //write 0110
  {
    digitalWrite(N1A, LOW);
    digitalWrite(N1B, HIGH);
    digitalWrite(N1C, HIGH);
    digitalWrite(N1D, LOW);
  }
  if (dig1 == 7) //write 0111
  {
    digitalWrite(N1A, HIGH);
    digitalWrite(N1B, HIGH);
    digitalWrite(N1C, HIGH);
    digitalWrite(N1D, LOW);
  }
  if (dig1 == 8) //write 1000
  {
    digitalWrite(N1A, LOW);
    digitalWrite(N1B, LOW);
    digitalWrite(N1C, LOW);
    digitalWrite(N1D, HIGH);
  }
  if (dig1 == 9) //write 1001
  {
    digitalWrite(N1A, HIGH);
    digitalWrite(N1B, LOW);
    digitalWrite(N1C, LOW);
    digitalWrite(N1D, HIGH);
  }
  //  -------------------------   Display Second Nixie Tube Digit  N2 -------------------
  if (dig2 == 0) //write 0000
  {
    digitalWrite(N2A, LOW);
    digitalWrite(N2B, LOW);
    digitalWrite(N2C, LOW);
    digitalWrite(N2D, LOW);
  }
  if (dig2 == 1) //write 0001
  {
    digitalWrite(N2A, HIGH);
    digitalWrite(N2B, LOW);
    digitalWrite(N2C, LOW);
    digitalWrite(N2D, LOW);
  }
  if (dig2 == 2) //write 0010
  {
    digitalWrite(N2A, LOW);
    digitalWrite(N2B, HIGH);
    digitalWrite(N2C, LOW);
    digitalWrite(N2D, LOW);
  }
  if (dig2 == 3) //write 0011
  {
    digitalWrite(N2A, HIGH);
    digitalWrite(N2B, HIGH);
    digitalWrite(N2C, LOW);
    digitalWrite(N2D, LOW);
  }
  if (dig2 == 4) //write 0100
  {
    digitalWrite(N2A, LOW);
    digitalWrite(N2B, LOW);
    digitalWrite(N2C, HIGH);
    digitalWrite(N2D, LOW);
  }
  if (dig2 == 5) //write 0101
  {
    digitalWrite(N2A, HIGH);
    digitalWrite(N2B, LOW);
    digitalWrite(N2C, HIGH);
    digitalWrite(N2D, LOW);
  }
  if (dig2 == 6) //write 0110
  {
    digitalWrite(N2A, LOW);
    digitalWrite(N2B, HIGH);
    digitalWrite(N2C, HIGH);
    digitalWrite(N2D, LOW);
  }
  if (dig2 == 7) //write 0111
  {
    digitalWrite(N2A, HIGH);
    digitalWrite(N2B, HIGH);
    digitalWrite(N2C, HIGH);
    digitalWrite(N2D, LOW);
  }
  if (dig2 == 8) //write 1000
  {
    digitalWrite(N2A, LOW);
    digitalWrite(N2B, LOW);
    digitalWrite(N2C, LOW);
    digitalWrite(N2D, HIGH);
  }
  if (dig2 == 9) //write 1001
  {
    digitalWrite(N2A, HIGH);
    digitalWrite(N2B, LOW);
    digitalWrite(N2C, LOW);
    digitalWrite(N2D, HIGH);
  }
  //  ---------------------  Display the Third Nixie Tube Digit N3 -----------
  if (dig3 == 0) //write 0000
  {
    digitalWrite(N3A, LOW);
    digitalWrite(N3B, LOW);
    digitalWrite(N3C, LOW);
    digitalWrite(N3D, LOW);
  }
  if (dig3 == 1) //write 0001
  {
    digitalWrite(N3A, HIGH);
    digitalWrite(N3B, LOW);
    digitalWrite(N3C, LOW);
    digitalWrite(N3D, LOW);
  }
  if (dig3 == 2) //write 0010
  {
    digitalWrite(N3A, LOW);
    digitalWrite(N3B, HIGH);
    digitalWrite(N3C, LOW);
    digitalWrite(N3D, LOW);
  }
  if (dig3 == 3) //write 0011
  {
    digitalWrite(N3A, HIGH);
    digitalWrite(N3B, HIGH);
    digitalWrite(N3C, LOW);
    digitalWrite(N3D, LOW);
  }
  if (dig3 == 4) //write 0100
  {
    digitalWrite(N3A, LOW);
    digitalWrite(N3B, LOW);
    digitalWrite(N3C, HIGH);
    digitalWrite(N3D, LOW);
  }
  if (dig3 == 5) //write 0101
  {
    digitalWrite(N3A, HIGH);
    digitalWrite(N3B, LOW);
    digitalWrite(N3C, HIGH);
    digitalWrite(N3D, LOW);
  }
  if (dig3 == 6) //write 0110
  {
    digitalWrite(N3A, LOW);
    digitalWrite(N3B, HIGH);
    digitalWrite(N3C, HIGH);
    digitalWrite(N3D, LOW);
  }
  if (dig3 == 7) //write 0111
  {
    digitalWrite(N3A, HIGH);
    digitalWrite(N3B, HIGH);
    digitalWrite(N3C, HIGH);
    digitalWrite(N3D, LOW);
  }
  if (dig3 == 8) //write 1000
  {
    digitalWrite(N3A, LOW);
    digitalWrite(N3B, LOW);
    digitalWrite(N3C, LOW);
    digitalWrite(N3D, HIGH);
  }
  if (dig3 == 9) //write 1001
  {
    digitalWrite(N3A, HIGH);
    digitalWrite(N3B, LOW);
    digitalWrite(N3C, LOW);
    digitalWrite(N3D, HIGH);
  }
  // ---------------------- Display the Fourth Nixie Tube Digit N4 -------------------
  if (dig4 == 0) //write 0000
  {
    digitalWrite(N4A, LOW);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, LOW);
  }
  if (dig4 == 1) //write 0001
  {
    digitalWrite(N4A, HIGH);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, LOW);
  }
  if (dig4 == 2) //write 0010
  {
    digitalWrite(N4A, LOW);
    digitalWrite(N4B, HIGH);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, LOW);
  }
  if (dig4 == 3) //write 0011
  {
    digitalWrite(N4A, HIGH);
    digitalWrite(N4B, HIGH);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, LOW);
  }
  if (dig4 == 4) //write 0100
  {
    digitalWrite(N4A, LOW);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, HIGH);
    digitalWrite(N4D, LOW);
  }
  if (dig4 == 5) //write 0101
  {
    digitalWrite(N4A, HIGH);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, HIGH);
    digitalWrite(N4D, LOW);
  }
  if (dig4 == 6) //write 0110
  {
    digitalWrite(N4A, LOW);
    digitalWrite(N4B, HIGH);
    digitalWrite(N4C, HIGH);
    digitalWrite(N4D, LOW);
  }
  if (dig4 == 7) //write 0111
  {
    digitalWrite(N4A, HIGH);
    digitalWrite(N4B, HIGH);
    digitalWrite(N4C, HIGH);
    digitalWrite(N4D, LOW);
  }
  if (dig4 == 8) //write 1000
  {
    digitalWrite(N4A, LOW);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, HIGH);
  }
  if (dig4 == 9) //write 1001
  {
    digitalWrite(N4A, HIGH);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, HIGH);
  }
  delay (10);
  //  -------------------------   Display Fifth Nixie Tube Digit  N5 -------------------
  if (dig5 == 0) //write 0000
  {
    digitalWrite(N5A, LOW);
    digitalWrite(N5B, LOW);
    digitalWrite(N5C, LOW);
    digitalWrite(N5D, LOW);
  }
  if (dig5 == 1) //write 0001
  {
    digitalWrite(N5A, HIGH);
    digitalWrite(N5B, LOW);
    digitalWrite(N5C, LOW);
    digitalWrite(N5D, LOW);
  }
  if (dig5 == 2) //write 0010
  {
    digitalWrite(N5A, LOW);
    digitalWrite(N5B, HIGH);
    digitalWrite(N5C, LOW);
    digitalWrite(N5D, LOW);
  }
  if (dig5 == 3) //write 0011
  {
    digitalWrite(N5A, HIGH);
    digitalWrite(N5B, HIGH);
    digitalWrite(N5C, LOW);
    digitalWrite(N5D, LOW);
  }
  if (dig5 == 4) //write 0100
  {
    digitalWrite(N5A, LOW);
    digitalWrite(N5B, LOW);
    digitalWrite(N5C, HIGH);
    digitalWrite(N5D, LOW);
  }
  if (dig5 == 5) //write 0101
  {
    digitalWrite(N5A, HIGH);
    digitalWrite(N5B, LOW);
    digitalWrite(N5C, HIGH);
    digitalWrite(N5D, LOW);
  }
  if (dig5 == 6) //write 0110
  {
    digitalWrite(N5A, LOW);
    digitalWrite(N5B, HIGH);
    digitalWrite(N5C, HIGH);
    digitalWrite(N5D, LOW);
  }
  if (dig5 == 7) //write 0111
  {
    digitalWrite(N5A, HIGH);
    digitalWrite(N5B, HIGH);
    digitalWrite(N5C, HIGH);
    digitalWrite(N5D, LOW);
  }
  if (dig5 == 8) //write 1000
  {
    digitalWrite(N5A, LOW);
    digitalWrite(N5B, LOW);
    digitalWrite(N5C, LOW);
    digitalWrite(N5D, HIGH);
  }
  if (dig5 == 9) //write 1001
  {
    digitalWrite(N5A, HIGH);
    digitalWrite(N5B, LOW);
    digitalWrite(N5C, LOW);
    digitalWrite(N5D, HIGH);
  }
}
void DisplayTemp()
{
  //Top Colon Light
  digitalWrite(5, LOW);
  //Bottom Colon Point
  digitalWrite(7, HIGH);  //A2
  if (digOne == 0) //write 0000
  {
    digitalWrite(N1A, LOW);
    digitalWrite(N1B, LOW);
    digitalWrite(N1C, LOW);
    digitalWrite(N1D, LOW);
  }
  if (digOne == 1) //write 0001
  {
    digitalWrite(N1A, HIGH);
    digitalWrite(N1B, LOW);
    digitalWrite(N1C, LOW);
    digitalWrite(N1D, LOW);
  }
  if (digOne == 2) //write 0010
  {
    digitalWrite(N1A, LOW);
    digitalWrite(N1B, HIGH);
    digitalWrite(N1C, LOW);
    digitalWrite(N1D, LOW);
  }
  if (digOne == 3) //write 0011
  {
    digitalWrite(N1A, HIGH);
    digitalWrite(N1B, HIGH);
    digitalWrite(N1C, LOW);
    digitalWrite(N1D, LOW);
  }
  if (digOne == 4) //write 0100
  {
    digitalWrite(N1A, LOW);
    digitalWrite(N1B, LOW);
    digitalWrite(N1C, HIGH);
    digitalWrite(N1D, LOW);
  }
  if (digOne == 5) //write 0101
  {
    digitalWrite(N1A, HIGH);
    digitalWrite(N1B, LOW);
    digitalWrite(N1C, HIGH);
    digitalWrite(N1D, LOW);
  }
  if (digOne == 6) //write 0110
  {
    digitalWrite(N1A, LOW);
    digitalWrite(N1B, HIGH);
    digitalWrite(N1C, HIGH);
    digitalWrite(N1D, LOW);
  }
  if (digOne == 7) //write 0111
  {
    digitalWrite(N1A, HIGH);
    digitalWrite(N1B, HIGH);
    digitalWrite(N1C, HIGH);
    digitalWrite(N1D, LOW);
  }
  if (digOne == 8) //write 1000
  {
    digitalWrite(N1A, LOW);
    digitalWrite(N1B, LOW);
    digitalWrite(N1C, LOW);
    digitalWrite(N1D, HIGH);
  }
  if (digOne == 9) //write 1001
  {
    digitalWrite(N1A, HIGH);
    digitalWrite(N1B, LOW);
    digitalWrite(N1C, LOW);
    digitalWrite(N1D, HIGH);
  }
  if (digTwo == 0) //write 0000
  {
    digitalWrite(N2A, LOW);
    digitalWrite(N2B, LOW);
    digitalWrite(N2C, LOW);
    digitalWrite(N2D, LOW);
  }
  if (digTwo == 1) //write 0001
  {
    digitalWrite(N2A, HIGH);
    digitalWrite(N2B, LOW);
    digitalWrite(N2C, LOW);
    digitalWrite(N2D, LOW);
  }
  if (digTwo == 2) //write 0010
  {
    digitalWrite(N2A, LOW);
    digitalWrite(N2B, HIGH);
    digitalWrite(N2C, LOW);
    digitalWrite(N2D, LOW);
  }
  if (digTwo == 3) //write 0011
  {
    digitalWrite(N2A, HIGH);
    digitalWrite(N2B, HIGH);
    digitalWrite(N2C, LOW);
    digitalWrite(N2D, LOW);
  }
  if (digTwo == 4) //write 0100
  {
    digitalWrite(N2A, LOW);
    digitalWrite(N2B, LOW);
    digitalWrite(N2C, HIGH);
    digitalWrite(N2D, LOW);
  }
  if (digTwo == 5) //write 0101
  {
    digitalWrite(N2A, HIGH);
    digitalWrite(N2B, LOW);
    digitalWrite(N2C, HIGH);
    digitalWrite(N2D, LOW);
  }
  if (digTwo == 6) //write 0110
  {
    digitalWrite(N2A, LOW);
    digitalWrite(N2B, HIGH);
    digitalWrite(N2C, HIGH);
    digitalWrite(N2D, LOW);
  }
  if (digTwo == 7) //write 0111
  {
    digitalWrite(N2A, HIGH);
    digitalWrite(N2B, HIGH);
    digitalWrite(N2C, HIGH);
    digitalWrite(N2D, LOW);
  }
  if (digTwo == 8) //write 1000
  {
    digitalWrite(N2A, LOW);
    digitalWrite(N2B, LOW);
    digitalWrite(N2C, LOW);
    digitalWrite(N2D, HIGH);
  }
  if (digTwo == 9) //write 1001
  {
    digitalWrite(N2A, HIGH);
    digitalWrite(N2B, LOW);
    digitalWrite(N2C, LOW);
    digitalWrite(N2D, HIGH);
  }
  if (digThree == 0) //write 0000
  {
    digitalWrite(N3A, LOW);
    digitalWrite(N3B, LOW);
    digitalWrite(N3C, LOW);
    digitalWrite(N3D, LOW);
  }
  if (digThree == 1) //write 0001
  {
    digitalWrite(N3A, HIGH);
    digitalWrite(N3B, LOW);
    digitalWrite(N3C, LOW);
    digitalWrite(N3D, LOW);
  }
  if (digThree == 2) //write 0010
  {
    digitalWrite(N3A, LOW);
    digitalWrite(N3B, HIGH);
    digitalWrite(N3C, LOW);
    digitalWrite(N3D, LOW);
  }
  if (digThree == 3) //write 0011
  {
    digitalWrite(N3A, HIGH);
    digitalWrite(N3B, HIGH);
    digitalWrite(N3C, LOW);
    digitalWrite(N3D, LOW);
  }
  if (digThree == 4) //write 0100
  {
    digitalWrite(N3A, LOW);
    digitalWrite(N3B, LOW);
    digitalWrite(N3C, HIGH);
    digitalWrite(N3D, LOW);
  }
  if (digThree == 5) //write 0101
  {
    digitalWrite(N3A, HIGH);
    digitalWrite(N3B, LOW);
    digitalWrite(N3C, HIGH);
    digitalWrite(N3D, LOW);
  }
  if (digThree == 6) //write 0110
  {
    digitalWrite(N3A, LOW);
    digitalWrite(N3B, HIGH);
    digitalWrite(N3C, HIGH);
    digitalWrite(N3D, LOW);
  }
  if (digThree == 7) //write 0111
  {
    digitalWrite(N3A, HIGH);
    digitalWrite(N3B, HIGH);
    digitalWrite(N3C, HIGH);
    digitalWrite(N3D, LOW);
  }
  if (digThree == 8) //write 1000
  {
    digitalWrite(N3A, LOW);
    digitalWrite(N3B, LOW);
    digitalWrite(N3C, LOW);
    digitalWrite(N3D, HIGH);
  }
  if (digThree == 9) //write 1001
  {
    digitalWrite(N3A, HIGH);
    digitalWrite(N3B, LOW);
    digitalWrite(N3C, LOW);
    digitalWrite(N3D, HIGH);
  }
  if (digFour == 0) //write 0000
  {
    digitalWrite(N4A, LOW);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, LOW);
  }
  if (digFour == 1) //write 0001
  {
    digitalWrite(N4A, HIGH);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, LOW);
  }
  if (digFour == 2) //write 0010
  {
    digitalWrite(N4A, LOW);
    digitalWrite(N4B, HIGH);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, LOW);
  }
  if (digFour == 3) //write 0011
  {
    digitalWrite(N4A, HIGH);
    digitalWrite(N4B, HIGH);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, LOW);
  }
  if (digFour == 4) //write 0100
  {
    digitalWrite(N4A, LOW);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, HIGH);
    digitalWrite(N4D, LOW);
  }
  if (digFour == 5) //write 0101
  {
    digitalWrite(N4A, HIGH);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, HIGH);
    digitalWrite(N4D, LOW);
  }
  if (digFour == 6) //write 0110
  {
    digitalWrite(N4A, LOW);
    digitalWrite(N4B, HIGH);
    digitalWrite(N4C, HIGH);
    digitalWrite(N4D, LOW);
  }
  if (digFour == 7) //write 0111
  {
    digitalWrite(N4A, HIGH);
    digitalWrite(N4B, HIGH);
    digitalWrite(N4C, HIGH);
    digitalWrite(N4D, LOW);
  }
  if (digFour == 8) //write 1000
  {
    digitalWrite(N4A, LOW);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, HIGH);
  }
  if (digFour == 9) //write 1001
  {
    digitalWrite(N4A, HIGH);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, HIGH);
  }
  if (digFive == 0) //write 0000
  {
    digitalWrite(N4A, LOW);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, LOW);
  }
}
//---------------------------------------------------
void DriveN5()
{
  if (digFive == 0) //write 0000
  {
    digitalWrite(N4A, LOW);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, LOW);
  }
  if (digFive == 1) //write 0001
  {
    digitalWrite(N4A, HIGH);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, LOW);
  }
  if (digFive == 2) //write 0010
  {
    digitalWrite(N4A, LOW);
    digitalWrite(N4B, HIGH);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, LOW);
  }
  if (digFive == 3) //write 0011
  {
    digitalWrite(N4A, HIGH);
    digitalWrite(N4B, HIGH);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, LOW);
  }
  if (digFive == 4) //write 0100
  {
    digitalWrite(N4A, LOW);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, HIGH);
    digitalWrite(N4D, LOW);
  }
  if (digFive == 5) //write 0101
  {
    digitalWrite(N4A, HIGH);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, HIGH);
    digitalWrite(N4D, LOW);
  }
  if (digFour == 6) //write 0110
  {
    digitalWrite(N4A, LOW);
    digitalWrite(N4B, HIGH);
    digitalWrite(N4C, HIGH);
    digitalWrite(N4D, LOW);
  }
  if (digFive == 7) //write 0111
  {
    digitalWrite(N4A, HIGH);
    digitalWrite(N4B, HIGH);
    digitalWrite(N4C, HIGH);
    digitalWrite(N4D, LOW);
  }
  if (digFour == 8) //write 1000
  {
    digitalWrite(N4A, LOW);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, HIGH);
  }
  if (digFive == 9) //write 1001
  {
    digitalWrite(N4A, HIGH);
    digitalWrite(N4B, LOW);
    digitalWrite(N4C, LOW);
    digitalWrite(N4D, HIGH);
  }
}