int val = 0;//sets value variable to 0

void setup() {
pinMode (13,OUTPUT);//pin 13 is the led pin and speaker
  pinMode (9, INPUT);//pin 9 reads the high signal from the PIR
}
void loop () {
val = digitalRead(9);//Pin 9 is initiallly 0
digitalWrite(13,val);//pin thirteen is equal to whatever pin 9 is
delay(100);
digitalWrite(13,LOW);//led turns off
}