const int redLightPin = 9;    // Red light pin
const int yellowLightPin = 10; // Yellow light pin
const int greenLightPin = 11;  // Green light pin
const int turnSignalPin = 13;   // Turn signal pin

void setup() {
    // Set pin modes
    pinMode(redLightPin, OUTPUT);
    pinMode(yellowLightPin, OUTPUT);
    pinMode(greenLightPin, OUTPUT);
    pinMode(turnSignalPin, OUTPUT);
}

void loop() {
    // Red light
    digitalWrite(redLightPin, HIGH);
    digitalWrite(yellowLightPin, LOW);
    digitalWrite(greenLightPin, LOW);
    digitalWrite(turnSignalPin, LOW); // Turn signal off
    delay(3000); // Red light duration

    // Yellow light
    digitalWrite(redLightPin, LOW);
    digitalWrite(yellowLightPin, HIGH);
    digitalWrite(greenLightPin, LOW);
    digitalWrite(turnSignalPin, LOW); // Turn signal off
    delay(500); // Yellow light duration

    // Green light
    digitalWrite(redLightPin, LOW);
    digitalWrite(yellowLightPin, LOW);
    digitalWrite(greenLightPin, HIGH);
    digitalWrite(turnSignalPin, HIGH); // Turn signal on
    delay(3000); // Green light duration

    // Blinking green light and turning signal
    for (int i = 0; i < 5; i++) {
        digitalWrite(greenLightPin, HIGH);
        digitalWrite(turnSignalPin, HIGH); // Turning signal on
        delay(500); // On for 500 ms
        digitalWrite(greenLightPin, LOW);
        digitalWrite(turnSignalPin, LOW); // Turning signal off
        delay(500); // Off for 500 ms
    }

    // After blinking, turn off the green light and turn signal
    digitalWrite(greenLightPin, LOW);
    digitalWrite(turnSignalPin, LOW); // Turning signal off

    // Yellow light again
    digitalWrite(redLightPin, LOW);
    digitalWrite(yellowLightPin, HIGH);
    delay(3000); // Yellow light duration
}