#define pinSwitch 13
#define pinRelay 15

void setup() {
  // put your setup code here, to run once:
  pinMode(pinSwitch, INPUT_PULLUP);
  pinMode(pinRelay,OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int nilaiswitch = digitalRead((pinSwitch));
  Serial.println(nilaiswitch);
  if(nilaiswitch == 0){
    digitalWrite(pinRelay,HIGH);
  }
  else{
    digitalWrite(pinRelay,LOW);
  }
}