const int pirPin = 2;       // PIR sensor connected to digital pin 2
const int buzzerPin = 9;    // Pin for the buzzer
const int ledPin = 8;       // Pin for the LED

void setup() {
  pinMode(pirPin, INPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  int pirState = digitalRead(pirPin);

  if (pirState == HIGH) {
    // Motion detected
    tone(buzzerPin, 1000);    // Sound the buzzer at 1000 Hz
    digitalWrite(ledPin, HIGH);     // Turn on the LED
    delay(500);  // Wait for 0.5 seconds
    noTone(buzzerPin);       // Turn off the buzzer
    digitalWrite(ledPin, LOW);      // Turn off the LED
    delay(500);  // Wait for 0.5 seconds (LED blinks at 1Hz)
  } else {
    // No motion detected
    noTone(buzzerPin);       // Turn off the buzzer
    digitalWrite(ledPin, LOW);      // Turn off the LED
  }
}