#define pinSwitch 2
#define pinRelay 3

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

}

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

    digitalWrite(pinRelay,LOW);
  }

}