// Nama: Gabriel Marcellino Sinurat
// NIM: 22552011043
// Kelas: TIF RM - 22 CID

int ledPinMerah = 8;
int ledPinKuning = 9;
int ledPinHijau = 10;

void setup() {
  pinMode(ledPinMerah, OUTPUT);
  pinMode(ledPinKuning, OUTPUT);
  pinMode(ledPinHijau, OUTPUT);
}

void loop() {
  digitalWrite(ledPinMerah, HIGH);
  digitalWrite(ledPinKuning, LOW);
  digitalWrite(ledPinHijau, LOW);
  delay(2000);

  digitalWrite(ledPinMerah, LOW);
  digitalWrite(ledPinKuning, HIGH);
  digitalWrite(ledPinHijau, LOW);
  delay(2000);

  digitalWrite(ledPinMerah, LOW);
  digitalWrite(ledPinKuning, LOW);
  digitalWrite(ledPinHijau, HIGH);
  delay(2000);
}