// Pin assignments
const int redPin = 10;
const int yellowPin = 9;
const int greenPin = 8;

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

void loop() {
  // Red light on
  digitalWrite(redPin, HIGH);
  delay(2000); // Wait for 2 seconds
  digitalWrite(redPin, LOW);

  digitalWrite(yellowPin, HIGH);
  delay(2000); // Wait for 2 seconds
  digitalWrite(yellowPin, LOW);

  // Green light on
  digitalWrite(greenPin, HIGH);
  delay(2000); // Wait for 2 seconds
  digitalWrite(greenPin, LOW);

  // Yellow light on
  

  // Optional gap between cycles
  delay(2000); // Wait for 2 seconds before the next cycle
}