const int ledPin = 13; // choose the pin for the LED
const int inputPin = 2; // choose the input pin (for the PIR sensor)
void setup() {
 pinMode(ledPin, OUTPUT); // declare LED as output
 pinMode(inputPin, INPUT); // declare pushbutton as input
}
void loop(){
 int val = digitalRead(inputPin); // read input value
 if (val == HIGH) // check if the input is HIGH

 {
 digitalWrite(ledPin, HIGH); // turn LED on if motion detected
 delay(500);
 digitalWrite(ledPin, LOW); // turn LED off
 }
}