const int pirPin = 2; 

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

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

  if (pirValue == HIGH) {
    Serial.println("Motion detected!"); 
  } else {
    Serial.println("No motion detected."); 
  }

  delay(1000);
}