const int merah = 4;
const int kuning = 5;
const int hijau = 6;
const int biru = 7;
const int ungu = 8;

void setup() {
  pinMode(merah, OUTPUT);
  pinMode(kuning, OUTPUT);
  pinMode(hijau, OUTPUT);
  pinMode(biru, OUTPUT);
  pinMode(ungu, INPUT);

}

void loop() {
  digitalWrite(merah, HIGH);
  digitalWrite(merah, LOW);
  digitalWrite(kuning, HIGH);
  digitalWrite(kuning, LOW);
  digitalWrite(biru, HIGH);
  digitalWrite(biru, LOW);
  digitalWrite(ungu, HIGH);
  digitalWrite(ungu, LOW);
  delay(500);

  digitalWrite(hijau, HIGH);
  digitalWrite(hijau, LOW);
digitalWrite(hijau, HIGH);
digitalWrite(hijau, LOW);
delay(500);



}