const int pirPin = 2;  // PIR sensor pin (PB2)
const int ledPin = 0;  // LED pin (PB0)

void setup() {
  pinMode(pirPin, INPUT);  // set PIR sensor pin as input
  pinMode(ledPin, OUTPUT); // set LED pin as output
}

void loop() {
  if (digitalRead(pirPin) == HIGH) {  // check if motion is detected
    digitalWrite(ledPin, HIGH);  // turn on LED
    delay(1000);  // keep LED on for 1 second
  } else {
    digitalWrite(ledPin, LOW);  // turn off LED
  }
  delay(100);  // small delay to debounce the sensor
}
Eng Odeh Alamrow