const int RED_PIN = 2;      // Red LED pin
const int YELLOW_PIN = 5;   // Yellow LED pin
const int GREEN_PIN = 9;    // Green LED pin
const int WHITE_TURN_PIN = 13; // Turn signal LED pin

void setup() {
  pinMode(RED_PIN, OUTPUT);
  pinMode(YELLOW_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT);
  pinMode(WHITE_TURN_PIN, OUTPUT);
}

void loop() {
  // Red light on
  digitalWrite(RED_PIN, HIGH);
  digitalWrite(YELLOW_PIN, LOW);
  digitalWrite(GREEN_PIN, LOW);
  digitalWrite(WHITE_TURN_PIN, LOW);
  delay(3000); // Red for 3 seconds

  // Red light off, Yellow light on
  digitalWrite(RED_PIN, LOW);
  digitalWrite(YELLOW_PIN, HIGH);
  delay(1000); // Yellow for 1 second

  // Yellow light off, Green light on
  digitalWrite(YELLOW_PIN, LOW);
  digitalWrite(GREEN_PIN, HIGH);
  digitalWrite(WHITE_TURN_PIN, HIGH); // Turn signal ON
  delay(3000); // Green for 3 seconds

  // Green blinking with turn signal
  for (int i = 0; i < 5; i++) {
    digitalWrite(GREEN_PIN, HIGH);
    digitalWrite(WHITE_TURN_PIN, HIGH);
    delay(500); // ON for 0.5 seconds
    digitalWrite(GREEN_PIN, LOW);
    digitalWrite(WHITE_TURN_PIN, LOW);
    delay(500); // OFF for 0.5 seconds
  }

  // Switch back to Yellow
  digitalWrite(GREEN_PIN, LOW);
  digitalWrite(WHITE_TURN_PIN, LOW);
  digitalWrite(YELLOW_PIN, HIGH);
  delay(3000); // Yellow for 3 seconds

  // Yellow light off, Red light on
  digitalWrite(YELLOW_PIN, LOW);
  digitalWrite(RED_PIN, HIGH);
  delay(3000); // Red for 3 seconds
}