#define RED_PIN 23
#define YELLOW_PIN 17
#define GREEN_PIN 22

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

void loop() {
  // Red light
  digitalWrite(RED_PIN, HIGH);
  digitalWrite(YELLOW_PIN, LOW);
  digitalWrite(GREEN_PIN, LOW);
  delay(5000);  // Red light for 5 seconds

  // Green light
  digitalWrite(RED_PIN, LOW);
  digitalWrite(YELLOW_PIN, LOW);
  digitalWrite(GREEN_PIN, HIGH);
  delay(5000);  // Green light for 5 seconds

  // Yellow light
  digitalWrite(RED_PIN, LOW);
  digitalWrite(YELLOW_PIN, HIGH);
  digitalWrite(GREEN_PIN, LOW);
  delay(2000);  // Yellow light for 2 seconds
}