#include <Servo.h>

int pirPin = 2;
int ledPin = 8;
int buzzerPin = 7;
int servoPin = 9;

Servo servoMotor;

void setup() {
  pinMode(pirPin, INPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  servoMotor.attach(servoPin);
}

void loop() {
  if (digitalRead(pirPin) == HIGH) {
    digitalWrite(ledPin, HIGH);
    digitalWrite(buzzerPin, HIGH);
    delay(500);
    digitalWrite(buzzerPin, LOW);
    servoMotor.write(90); // unlock door
    delay(5000);
    servoMotor.write(0); // lock door
  }
  else {
    digitalWrite(ledPin, LOW);
    digitalWrite(buzzerPin, LOW);
  }
}