PIR

int pir = 2;
int led = 13;

int value = 0;
void setup() {
    //put your setup code here, to run once:
pinMode (pir, INPUT);
pinMode (led, OUTPUT);
Serial.begin(9600);

}

void loop() {
    //put your main code here, to run repeatedly:
value = digitalRead(pir);
Serial.println(value);

if (value==1)
{
digitalWrite(led,HIGH);
}

else
{
digitalWrite(led,LOW);
}
}