int redPin = 7; // Lampu Merah
int yellowPin = 6; // Lampu Kuning
int greenPin = 5; // Lampu Hijau


void setup() {
  // put your setup code here, to run once:
  pinMode(redPin, OUTPUT);
  pinMode(yellowPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(redPin, HIGH); // Lampu Merah On
  digitalWrite(yellowPin, LOW);
  digitalWrite(greenPin, LOW);
  delay(3000); // Jeda 3 detik

   // Lampu Kuning berkedip 3 kali
  for (int i = 1; i <= 3; i++) {
    digitalWrite(yellowPin, HIGH); // Nyalakan lampu kuning
    delay(1000);                   // Tunggu 1 detik
    digitalWrite(yellowPin, LOW);  // Matikan lampu kuning
    delay(1000);                   // Tunggu 1 detik
  }

  digitalWrite(redPin, LOW); // Lampu Hijau On
  digitalWrite(yellowPin, LOW);
  digitalWrite(greenPin, HIGH);
  delay(3000); // Jeda 3 detik
}