#define pinPir 2
#define pinRelay 3 
 void setup() {
  // put your setup code here, to run once:
pinMode(pinPir, INPUT_PULLUP);
pinMode(pinRelay, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
int nilaiPir = digitalRead((pinPir));
if (nilaiPir == 0){
  digitalWrite(pinRelay, HIGH);
}
else{
  digitalWrite(pinRelay, LOW);
}
}