// Setting the LED pin used
const int LED_red = 2;
const int LED_yellow = 4;
const int LED_green = 5;
const int button_pin = 13;
const int buzzer_pin = 12;

void setup() {
  // Setting the LED pin as OUTPUT
  pinMode(LED_red, OUTPUT);
  pinMode(LED_yellow, OUTPUT);
  pinMode(LED_green, OUTPUT);
  pinMode(button_pin, INPUT_PULLUP);
  pinMode(buzzer_pin, OUTPUT);

  // Turn off all  LED and buzzer
  digitalWrite(LED_red, LOW);
  digitalWrite(LED_yellow, LOW);
  digitalWrite(LED_green, LOW);
  digitalWrite(buzzer_pin, LOW);

  Serial.begin(9600);
}

void loop() {
  if (digitalRead(button_pin) == LOW) {
    // OFF button pressed
    digitalWrite(LED_red, HIGH);
    digitalWrite(LED_yellow, HIGH);
    digitalWrite(LED_green, LOW);
    digitalWrite(buzzer_pin, LOW);
    Serial.println("No Crossing the Road");
    delay(1000); // Wait 1 second
    digitalWrite(LED_yellow, LOW);
    delay(1000); // Wait 1 second
  } else {
    // ON button pressed
    digitalWrite(LED_red, LOW);
    digitalWrite(LED_yellow, LOW);
    digitalWrite(LED_green, HIGH);
    digitalWrite(buzzer_pin, HIGH);
    Serial.println("Please Cross the Road");
    delay(4000); // Wait 4 seconds
    digitalWrite(LED_green, LOW);
    digitalWrite(buzzer_pin, LOW);
  }
}