// Definisi pin LED untuk masing-masing simpang
const int trafficLights[3][3] = {
  {2, 3, 4}, // Simpang 1: Merah, Kuning, Hijau
  {5, 6, 7}, // Simpang 2: Merah, Kuning, Hijau
  {8, 9, 10} // Simpang 3: Merah, Kuning, Hijau
};

// Durasi dalam milidetik
const int redDuration = 5000;    // Durasi lampu merah
const int yellowDuration = 2000; // Durasi lampu kuning
const int greenDuration = 5000;  // Durasi lampu hijau

void setup() {
  // Inisialisasi semua pin LED sebagai output
  for (int i = 0; i < 3; i++) {
    for (int j = 0; j < 3; j++) {
      pinMode(trafficLights[i][j], OUTPUT);
    }
  }
}

void loop() {
  // Simpang 1 hijau, Simpang 2 merah, Simpang 3 merah
  setTrafficLights(0, HIGH, LOW, LOW);
  setTrafficLights(1, LOW, LOW, HIGH);
  setTrafficLights(2, LOW, LOW, HIGH);
  delay(greenDuration);

  // Simpang 1 kuning, Simpang 2 merah, Simpang 3 merah
  setTrafficLights(0, LOW, HIGH, LOW);
  setTrafficLights(1, LOW, LOW, HIGH);
  setTrafficLights(2, LOW, LOW, HIGH);
  delay(yellowDuration);

  // Simpang 1 merah, Simpang 2 hijau, Simpang 3 merah
  setTrafficLights(0, LOW, LOW, HIGH);
  setTrafficLights(1, HIGH, LOW, LOW);
  setTrafficLights(2, LOW, LOW, HIGH);
  delay(greenDuration);

  // Simpang 1 merah, Simpang 2 kuning, Simpang 3 merah
  setTrafficLights(0, LOW, LOW, HIGH);
  setTrafficLights(1, LOW, HIGH, LOW);
  setTrafficLights(2, LOW, LOW, HIGH);
  delay(yellowDuration);

  // Simpang 1 merah, Simpang 2 merah, Simpang 3 hijau
  setTrafficLights(0, LOW, LOW, HIGH);
  setTrafficLights(1, LOW, LOW, HIGH);
  setTrafficLights(2, HIGH, LOW, LOW);
  delay(greenDuration);

  // Simpang 1 merah, Simpang 2 merah, Simpang 3 kuning
  setTrafficLights(0, LOW, LOW, HIGH);
  setTrafficLights(1, LOW, LOW, HIGH);
  setTrafficLights(2, LOW, HIGH, LOW);
  delay(yellowDuration);
}

void setTrafficLights(int intersection, int green, int yellow, int red) {
  digitalWrite(trafficLights[intersection][0], red);
  digitalWrite(trafficLights[intersection][1], yellow);
  digitalWrite(trafficLights[intersection][2], green);
}