int pir=10;
int LED=9;
void setup() {
  // put your setup code here, to run once:
   Serial.begin(9600);
   pinMode(pir,INPUT);
   pinMode(LED,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int val=digitalRead(pir);
  if(val){
    digitalWrite(LED,HIGH);
  }
  else{
    digitalWrite(LED,LOW);
  }
}