#include <Arduino.h> // Include necessary library (assuming Arduino)

int carRed = 13; // Assign pin number to car red light (might differ)
int carGreen = 12; // Assign pin number to car green light (might differ)

int button = 7; // Assign pin number to button (might differ)

// Variable to keep track of the currently lit LED
int currentLED = carRed;

void setup(){
  pinMode(carRed, OUTPUT);
  pinMode(carGreen, OUTPUT);
  pinMode(button, INPUT_PULLUP); // Button with internal pull-up resistor
  digitalWrite(carRed, HIGH); // Initially turn on red light
}

void loop() {
  int state = digitalRead(button);
  if (state == LOW) { // Button is pressed (LOW due to pull-up)
    digitalWrite(carRed, LOW);
    digitalWrite(carGreen, LOW); // Turn off both lights
    
    // Cycle through LEDs based on currentLED
    if (currentLED == carRed) {
      digitalWrite(carRed, HIGH);
      currentLED = carGreen;
    } else if (currentLED == carGreen) {
      digitalWrite(carGreen, HIGH);
      currentLED = carRed;
    }
    delay(500); // Debounce delay
  }
}