// Pin definitions
const int redPin = 13;
const int yellowPin = 12;
const int greenPin = 11;

void setup() {
  // Initialize the LED pins as outputs
  pinMode(redPin, OUTPUT);
  pinMode(yellowPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
}

void loop() {
  // Turn on the red LED and turn off the others
  digitalWrite(redPin, HIGH);
  digitalWrite(yellowPin, LOW);
  digitalWrite(greenPin, LOW);
  delay(5000); // Red light for 5 seconds

  // Turn on the yellow LED and turn off the others
  digitalWrite(redPin, LOW);
  digitalWrite(yellowPin, HIGH);
  digitalWrite(greenPin, LOW);
  delay(2000); // Yellow light for 2 seconds

  // Turn on the green LED and turn off the others
  digitalWrite(redPin, LOW);
  digitalWrite(yellowPin, LOW);
  digitalWrite(greenPin, HIGH);
  delay(5000); // Green light for 5 seconds

  // Optionally, you can add a delay before the next cycle
  delay(1000); // Short delay before restarting the cycle
}