// Define the PIR sensor pin and LED pin
int pirPin = 2;  // PIR sensor output pin connected to digital pin 2
int ledPin = 5; // LED connected to digital pin 13

void setup() {
  pinMode(pirPin, INPUT);  // Set PIR sensor pin as input
  pinMode(ledPin, OUTPUT); // Set LED pin as output
  Serial.begin(9600);      // Initialize serial communication for debugging
}

void loop() {
  int pirState = digitalRead(pirPin); // Read the state of the PIR sensor

  if (pirState == HIGH) {             // If motion is detected
    digitalWrite(ledPin, HIGH);       // Turn on the LED
    Serial.println("Motion detected!");  // Print to Serial Monitor
  } else {
    digitalWrite(ledPin, LOW);        // Turn off the LED if no motion
  }

  delay(100); // Short delay to avoid excessive checking
}