#define ledMerah 13
#define ledBiru 12
#define ledHijau 14

void setup() {
  pinMode(ledMerah, OUTPUT);
  pinMode(ledBiru, OUTPUT);
  pinMode(ledHijau, OUTPUT);
}

void loop(){
  digitalWrite(ledMerah, HIGH);
  delay(500);
  digitalWrite(ledMerah, LOW);
  digitalWrite(ledBiru, HIGH);
  delay(500);
  digitalWrite(ledBiru, LOW);
  digitalWrite(ledHijau, HIGH);
  delay(500);
  digitalWrite(ledHijau, LOW);
  digitalWrite(ledBiru, HIGH);
  delay(500);
  digitalWrite(ledBiru, LOW);
}