#define pinLed_merah 32
#define pinLed_kuning 33
#define pinLed_hijau 25

void setup() {
  pinMode(pinLed_merah, OUTPUT);
  pinMode(pinLed_kuning, OUTPUT);
  pinMode(pinLed_hijau, OUTPUT);
}

void loop() {
  digitalWrite(pinLed_merah, 1);
  digitalWrite(pinLed_kuning, 0);
  digitalWrite(pinLed_hijau, 0);
  delay(500);
  digitalWrite(pinLed_merah, 0);
  digitalWrite(pinLed_kuning, 1);
  digitalWrite(pinLed_hijau, 0);
  delay(500);
  digitalWrite(pinLed_merah, 0);
  digitalWrite(pinLed_kuning, 0);
  digitalWrite(pinLed_hijau, 1);
  delay(500);
}