int inPin = 3;

void setup()
{
  pinMode(inPin,INPUT);
  Serial.begin(57600);
  //delay(1500);
  while(Serial.available() == false){
  }
  attachInterrupt(1, blink, FALLING);
  
}

int count=0;

int hours = 14;
int minutes = 10;
int seconds = 0;

void ClockTick()
{
  seconds++;
  if(seconds == 60){
    seconds = 0;
    minutes++;
  }
  if(minutes == 60){
    minutes = 0;
    hours++;
  }
  if(hours == 24){
    hours=0;
  }
  Serial.print("H: " ); Serial.print(hours); Serial.print(" M: "); Serial.print(minutes); Serial.print(" S: "); Serial.println(seconds);
}

void loop()
{

}

void blink()
{
  if(count == 50)
  {
    count = 0;
    ClockTick();
  }
  count++;
}