int tensOfMinutes, minutes, tensOfSeconds, seconds;
int Seperator = 12;
int BCD1_PINS[6] = {14,27, 26, 25,33,32 }; // D0,D1,D2,D3,BL,LT
int BCD2_PINS[6] = {4, 16, 17, 5,18,19};
int BCD3_PINS[6] = {6, 7, 8, 15,2,0};
int NumberArr[10][4] = {{0, 0, 0, 0}, {1, 0, 0, 0}, {0, 1, 0, 0}, {1, 1, 0, 0}, {0, 0, 1, 0}
  , {1, 0, 1, 0}, {0, 1, 1, 0}, {1, 1, 1, 0}, {0, 0, 0, 1}, {1, 0, 0, 1}
};
void setup() {

  // put your setup code here, to run once:
  Serial.begin(115200);
  
  for (int i = 0; i <= 5; i++) {//. set the BCD output pins
    pinMode(BCD1_PINS[i], OUTPUT);
    pinMode(BCD2_PINS[i], OUTPUT);
    pinMode(BCD3_PINS[i], OUTPUT);
  }
  pinMode(Seperator, OUTPUT);
delay(500);
digitalWrite(BCD1_PINS[4], HIGH);
delay(500);
}
int x = 70;
void loop() {
  setTime(x);
  x--;
  Serial.println(x);
  delay(1000);
}
void setTime( int totalSeconds){
parseTimeInt(totalSeconds, tensOfMinutes, minutes, tensOfSeconds, seconds);
if(totalSeconds < 60  ){
  digitalWrite(BCD3_PINS[4], LOW);
  digitalWrite(Seperator, LOW);
}
else{
digitalWrite(BCD3_PINS[4], HIGH);
digitalWrite(Seperator, HIGH);

}

  for (int i = 0; i <= 3; i++) {

    digitalWrite(BCD3_PINS[i], NumberArr[minutes][i]);
    digitalWrite(BCD2_PINS[i], NumberArr[tensOfSeconds][i]);
    digitalWrite(BCD1_PINS[i], NumberArr[seconds][i]);

  }

}

void parseTimeInt(int totalSeconds, int& tensOfMinutes, int& minutes, int& tensOfSeconds, int& seconds) {
  // Calculate 10's of minutes, minutes, 10's of seconds, and seconds
  tensOfMinutes = totalSeconds / 600;
  totalSeconds %= 600;
  minutes = totalSeconds / 60;
  tensOfSeconds = (totalSeconds % 60) / 10;
  seconds = totalSeconds % 10;
}