#define ledMerah 13
#define ledKuning 12
#define ledHijau 14
 

void setup() {
  pinMode(ledMerah, OUTPUT);
  pinMode(ledKuning, OUTPUT);
  pinMode(ledHijau, OUTPUT);

}

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

}