#include <SevSeg.h>

#include <Wire.h>

//Pin definitions
const int digitPins[] = {2, 3, 4, 5}; 
const int segmentPins[] = {6, 7, 8, 9, 10, 11, 12, 13};

const byte digitPatterns[] = {
  B00111111, // 0
  B00000110, // 1
  B01011011, // 2
  B01001111, // 3
  B01100110, // 4
  B01101101, // 5
  B01111101, // 6
  B00000111, // 7
  B01111111, // 8
  B01101111// 9
};

int secondsCount = 0; //seconds count
int minutes = 50;
int hours = 12;
unsigned long timer = 0;
void setup () {

for (int i = 0; i < 4; i++) {
  pinMode(digitPins[i], OUTPUT);
  digitalWrite(digitPins[i], HIGH); //turn off all digits intially
}
// set the segment pins as outputs
for (int   i = 0; i < 8; i++) {
  pinMode(segmentPins[i], OUTPUT);
}
Serial.begin(9600);
}

void loop() {

  if (secondsCount < 60) {
    if(millis() - timer > 10000) {
      timer = timer + 1000;
      secondsCount++;
      Serial.println(secondsCount);
    }
    
  }

  if (secondsCount == 60){
    secondsCount = 0;
    minutes = minutes + 1;
  }
  if (minutes == 60 ) {
    minutes = 0;
    hours = hours + 1;
  }
  if (hours == 24) {
    secondsCount = 0;
    minutes = 0;
    hours = 0;
  }
//read current time

//display hours and minutes
displayNumber(hours / 10, 0); //display tens digit of hours
delay(5);
displayNumber(hours % 10, 1); //display ones digit of hours
delay(5);
displayNumber(minutes / 10, 2); //display tens digit of minutes
delay(5);
displayNumber(minutes % 10, 3); //display ones digit of minutes
delay(5);
}

void displayNumber(int number, int digit) {
  //activate the appropriate digit
  digitalWrite(digitPins[digit], LOW);

  //display the correspinding digit pattern 
  for (int i = 0; i < 8; i++) {
    digitalWrite(segmentPins[i], bitRead(digitPatterns[number], i));
  }
  if (digit == 1) {
    digitalWrite(segmentPins[7], HIGH);
  }
  delay(5);

  for (int i = 0; i < 8; i++) {
    digitalWrite(segmentPins[i], LOW);
  }
  digitalWrite(digitPins[digit], HIGH);
}