// Pin Definitions
#define MOTION_SENSOR_PIN 2  // Pin connected to motion sensor
#define BUZZER_PIN 3         // Pin connected to buzzer

// Variables
int motionDetected = 0;     // Variable to store motion detection status

void setup() {
  // Initialize serial communication at 9600 baud
  Serial.begin(9600);

  // Set motion sensor pin as input
  pinMode(MOTION_SENSOR_PIN, INPUT);

  // Set buzzer pin as output
  pinMode(BUZZER_PIN, OUTPUT);
}

void loop() {
  // Read the motion sensor input
  motionDetected = digitalRead(MOTION_SENSOR_PIN);

  // If motion is detected
  if (motionDetected == HIGH) {
    Serial.println("Motion detected!");

    // Play a tone on the buzzer for 500 milliseconds
    tone(BUZZER_PIN, 1000); // Frequency of 1000Hz
    delay(500);             // Play for 500 milliseconds

    // Stop the tone
    noTone(BUZZER_PIN);
  }

  // Delay for stability
  delay(100);
}