#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 10, 9, 8, 7);


long int msec = 0;
int sec = 0;
int minutes = 0;
int period = 99;
unsigned long time_now = 10;
unsigned long time_pre = 10;
const int button = 2;
const int resetbutton = 3;
byte newButtonState = LOW;
byte oldButtonState = LOW;
byte oldResetButtonState = LOW;
boolean running = false;
double i = 0;
double a = millis();
double c ;

void setup() {
  lcd.begin(16, 0);
  pinMode(button, INPUT);
  pinMode(resetbutton, INPUT);
  timershow();
}

void loop() {
  byte newButtonState;
  byte newResetButtonState;

  newResetButtonState = digitalRead(resetbutton);
  if (newResetButtonState == HIGH && oldResetButtonState == LOW) {
    delay(50);     //debounce
    reset();
    timershow();
  }
  oldResetButtonState = newResetButtonState;

  newButtonState = digitalRead(button);
  if (newButtonState == HIGH && oldButtonState == LOW) {
    delay(50);     //debounce
    running = !running;
  }
  oldButtonState = newButtonState;
  
  if (running) {
    timer();
  }
}


void reset() { //set the clock to 0
    msec = 0;
    sec = 0;
    minutes = 0;
}

void timer() { //counting millisecounds, secounds and minutes
  time_now = millis();
  if ((time_now - time_pre) > period) {
    time_pre = time_now;
    msec ++;
    if (msec > 9) {
      msec = 0;    //if the timer goes to 100 it will reset to 0 and become +1 in the next column
      sec++;       //incrementing seconds by 1
    }
    if (sec > 59) //Allows for the minute to occur
    { minutes++;
      sec = 0;
    }
    timershow();
  }
}

void timershow() { //printing time to LCD
  lcd.setCursor(0, 1);
  if (minutes < 10) {
    lcd.print("0");
    lcd.print(minutes);
  }
  else {
    lcd.print(minutes);
  }
  lcd.print(":");
  if (sec < 10) {
    lcd.print("0");
    lcd.print(sec);
    lcd.print(":");
  }
  else {
    lcd.print(sec);
    lcd.print(":");
  }
  if (msec < 10) {
    lcd.print("0");
    lcd.print(msec);
  }
  else {
    lcd.print(msec);
  }



}

/*while(digitalRead(3) == HIGH)
{
 
c = millis();
i = (c - a) / 1000;
lcd.print(i);
lcd.setCursor(7,0);
lcd.print("Sec's");
lcd.setCursor(0,0);*/