int pirPin = 2;
int ledPin = 13;
int buzzerPin = 9;
int pirState = LOW;

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

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

  if (motionDetected == HIGH) {
    digitalWrite(ledPin, HIGH);
    digitalWrite(buzzerPin, HIGH);

    if (pirState == LOW) {
      Serial.println("Motion detected!");
      pirState = HIGH;
    }
  } 
  else {
    digitalWrite(ledPin, LOW);
    digitalWrite(buzzerPin, LOW);

    if (pirState == HIGH) {
      Serial.println("Motion ended.");
      pirState = LOW;
    }
  }
}