const int pirPin = 13;   // PIR sensor pin
const int redLEDPin = 12;
const int greenLEDPin = 14;
const int buzzerPin = 27;


void setup() {
  Serial.begin(9600);
  pinMode(pirPin, INPUT);
  pinMode(redLEDPin, OUTPUT);
  pinMode(greenLEDPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
}

void loop() {
  int pirState = digitalRead(pirPin);
  if (pirState == HIGH) {
    // Door open
    digitalWrite(redLEDPin, HIGH);
    digitalWrite(greenLEDPin, LOW);
    digitalWrite(buzzerPin, HIGH);
  } else {
    // Door close
    digitalWrite(redLEDPin, LOW);
    digitalWrite(greenLEDPin, HIGH);
    digitalWrite(buzzerPin, HIGH);
  }
  delay(2000);
  digitalWrite(buzzerPin, LOW);
}