// Deklarasi pin LED untuk lampu lalu lintas
int redNorth = 2;
int yellowNorth = 3;
int greenNorth = 4;
int redSouth = 5;
int yellowSouth = 6;
int greenSouth = 7;
int redEast = 8;
int yellowEast = 9;
int greenEast = 10;
int redWest = 11;
int yellowWest = 12;
int greenWest = 13;

void setup() {
  // Atur pin-pin sebagai OUTPUT
  pinMode(redNorth, OUTPUT);
  pinMode(yellowNorth, OUTPUT);
  pinMode(greenNorth, OUTPUT);
  pinMode(redSouth, OUTPUT);
  pinMode(yellowSouth, OUTPUT);
  pinMode(greenSouth, OUTPUT);
  pinMode(redEast, OUTPUT);
  pinMode(yellowEast, OUTPUT);
  pinMode(greenEast, OUTPUT);
  pinMode(redWest, OUTPUT);
  pinMode(yellowWest, OUTPUT);
  pinMode(greenWest, OUTPUT);
}

void loop() {
  // Jalur Utara-Selatan: Merah - Timur-Barat: Hijau
  digitalWrite(redNorth, HIGH);
  digitalWrite(greenSouth, HIGH);
  digitalWrite(redEast, HIGH);
  digitalWrite(greenWest, HIGH);

  delay(2000); // Tunggu selama 2 detik

  // Matikan lampu merah dan hijau
  digitalWrite(redNorth, LOW);
  digitalWrite(greenSouth, LOW);
  digitalWrite(redEast, LOW);
  digitalWrite(greenWest, LOW);

  // Jalur Utara-Selatan: Kuning - Timur-Barat: Merah
  digitalWrite(yellowNorth, HIGH);
  digitalWrite(redSouth, HIGH);

  delay(1000); // Tunggu selama 1 detik

  // Matikan lampu kuning
  digitalWrite(yellowNorth, LOW);
  digitalWrite(redSouth, LOW);

  // Jalur Utara-Selatan: Hijau - Timur-Barat: Merah
  digitalWrite(greenNorth, HIGH);
  digitalWrite(redEast, HIGH);

  delay(2000); // Tunggu selama 2 detik

  // Matikan lampu hijau dan merah
  digitalWrite(greenNorth, LOW);
  digitalWrite(redEast, LOW);

  // Jalur Utara-Selatan: Merah - Timur-Barat: Kuning
  digitalWrite(redNorth, HIGH);
  digitalWrite(yellowWest, HIGH);

  delay(1000); // Tunggu selama 1 detik

  // Matikan lampu merah dan kuning
  digitalWrite(redNorth, LOW);
  digitalWrite(yellowWest, LOW);

  // Jalur Utara-Selatan: Merah - Timur-Barat: Hijau
  digitalWrite(redSouth, HIGH);
  digitalWrite(greenWest, HIGH);

  delay(2000); // Tunggu selama 2 detik

  // Matikan lampu merah dan hijau
  digitalWrite(redSouth, LOW);
  digitalWrite(greenWest, LOW);

  // Jalur Utara-Selatan: Kuning - Timur-Barat: Merah
  digitalWrite(yellowSouth, HIGH);
  digitalWrite(redEast, HIGH);

  delay(1000); // Tunggu selama 1 detik

  // Matikan lampu kuning dan merah
  digitalWrite(yellowSouth, LOW);
  digitalWrite(redEast, LOW);

  // Jalur Utara-Selatan: Hijau - Timur-Barat: Merah
  digitalWrite(greenSouth, HIGH);
  digitalWrite(redWest, HIGH);

  delay(2000); // Tunggu selama 2 detik

  // Matikan lampu hijau dan merah
  digitalWrite(greenSouth, LOW);
  digitalWrite(redWest, LOW);
}