void setup() {
  // put your setup code here, to run once:
int pirPin = 2;   // PIR sensor output pin
int ledPin = 13;  // LED pin
}

void loop() {
  // put  pinMode(pirPin, INPUT);
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);  // Initialize serial communication for debugging
}

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

  if (pirState == HIGH) {  // If motion is detected
    digitalWrite(ledPin, HIGH);  // Turn on the LED
    Serial.println("Motion detected: LED ON");
  } else {
    digitalWrite(ledPin, LOW);   // Turn off the LED
    Serial.println("No motion: LED OFF");
  }your main code here, to run repeatedly:

}