#define pin_merah 5
#define pin_kuning 6
#define pin_hijau 7

void setup() {
  // put your setup code here, to run once:


 pinMode(pin_merah, OUTPUT);
 pinMode(pin_kuning, OUTPUT);
 pinMode(pin_hijau, OUTPUT);

 digitalWrite(pin_merah, LOW);

 digitalWrite(pin_kuning, LOW);
 digitalWrite(pin_hijau, LOW);
 delay(200);

 digitalWrite(pin_merah, HIGH);
 digitalWrite(pin_kuning, HIGH);
 digitalWrite(pin_hijau, HIGH);
}

void loop() {
  int nilai_delay =500;
  digitalWrite(pin_hijau, LOW);
  digitalWrite(pin_kuning, LOW);
  digitalWrite(pin_merah, HIGH);
  delay(nilai_delay);

  digitalWrite(pin_merah, LOW);
  digitalWrite(pin_hijau, LOW);
  digitalWrite(pin_kuning, HIGH);
  delay(nilai_delay);

  digitalWrite(pin_kuning, LOW);
  digitalWrite(pin_merah, LOW);
  digitalWrite(pin_hijau, HIGH);
  delay(nilai_delay);

  //digitalWrite(pin_merah, HIGH);
  //delay(nilai_delay);
  //digitalWrite(pin_kuning, HIGH);
  //delay(nilai_delay);
  //digitalWrite)pin_hijau, HIGH);
  //delay(nilai_delay);


}