#include <Arduino.h>

// Definisi pin untuk relay lampu lalu lintas
const int redRelay1 = 27;
const int yellowRelay1 = 14;
const int greenRelay1 = 12;

const int redRelay2 = 23;
const int yellowRelay2 = 22;
const int greenRelay2 = 21;

const int redRelay3 = 19;
const int yellowRelay3 = 18;
const int greenRelay3 = 17;

void setup() {
    // Set pin sebagai output
    pinMode(redRelay1, OUTPUT);
    pinMode(yellowRelay1, OUTPUT);
    pinMode(greenRelay1, OUTPUT);
    pinMode(redRelay2, OUTPUT);
    pinMode(yellowRelay2, OUTPUT);
    pinMode(greenRelay2, OUTPUT);
    pinMode(redRelay3, OUTPUT);
    pinMode(yellowRelay3, OUTPUT);
    pinMode(greenRelay3, OUTPUT);
    //Serial.println("Lampu pertama hijau");
}

void loop() {
    // Arah 1 hijau, lainnya merah
    digitalWrite(greenRelay1, HIGH);
    digitalWrite(yellowRelay1, LOW);
    digitalWrite(redRelay1, LOW);
    digitalWrite(greenRelay2, LOW);
    digitalWrite(yellowRelay2, LOW);
    digitalWrite(redRelay2, HIGH);
    digitalWrite(greenRelay3, LOW);
    digitalWrite(yellowRelay3, LOW);
    digitalWrite(redRelay3, HIGH);
    delay(3000);
    
    // Arah 1 kuning
    digitalWrite(greenRelay1, LOW);
    digitalWrite(yellowRelay1, HIGH);
    delay(1000);
    digitalWrite(yellowRelay1, LOW);
    digitalWrite(redRelay1, HIGH);
    
    // Arah 2 hijau, lainnya merah
    digitalWrite(greenRelay2, HIGH);
    digitalWrite(redRelay2, LOW);
    delay(3000);
    
    // Arah 2 kuning
    digitalWrite(greenRelay2, LOW);
    digitalWrite(yellowRelay2, HIGH);
    delay(1000);
    digitalWrite(yellowRelay2, LOW);
    digitalWrite(redRelay2, HIGH);
    
    // Arah 3 hijau, lainnya merah
    digitalWrite(greenRelay3, HIGH);
    digitalWrite(redRelay3, LOW);
    delay(3000);
    
    // Arah 3 kuning
    digitalWrite(greenRelay3, LOW);
    digitalWrite(yellowRelay3, HIGH);
    delay(1000);
    digitalWrite(yellowRelay3, LOW);
    digitalWrite(redRelay3, HIGH);
}