const int pinSegmen[8] = {2, 3, 4, 5, 6, 7, 8};
const byte byteAngka[10]={
  B11111100,  // 0
  B01100000,  // 1
  B11011010,  // 2
  B11110010,  // 3
  B01100110,  // 4
  B10110110,  // 5
  B10111110,  // 6
  B11100000,  // 7
  B11111110,  // 8
  B11110110   // 9
};
#define merah 11
#define kuning 10
#define hijau 9
void setup() {
  for (int i = 0; i < 7; i++){
    pinMode(pinSegmen[i], OUTPUT);
  }
  pinMode(merah, OUTPUT);
  pinMode(kuning, OUTPUT);
  pinMode(hijau, OUTPUT);
}

void loop() {
  for (int i = 9; i >= 0; i--) {
    displayAngka(i);
    if (i < 4 && i > 0){
      digitalWrite(merah, LOW);
      digitalWrite(kuning, HIGH);
      digitalWrite(hijau, LOW);
    }else if (i == 0){
      digitalWrite(merah, LOW);
      digitalWrite(kuning, LOW);
      digitalWrite(hijau, HIGH);
    }else {
      digitalWrite(merah, HIGH);
      digitalWrite(kuning, LOW);
      digitalWrite(hijau, LOW);
    }
    delay(1000);
  }
}

void displayAngka(int num) {

  for ( int i = 1; i < 7; i++) {
    if (bitRead(byteAngka[num], i) ==LOW) {
      digitalWrite(pinSegmen[7-i], HIGH);
    }else {
      digitalWrite(pinSegmen[7-i], LOW);
    }
  }
}