#define go 2
#define stop 3
#define back 4

void setup() {
  // put your setup code here, to run once:
pinMode(stop, INPUT_PULLUP);
pinMode(go, INPUT_PULLUP);
pinMode(back, INPUT_PULLUP);

}

void loop() {
  //
digitalWrite(3,HIGH);
if (digitalRead(3)==HIGH){
  digitalWrite(2, HIGH);
}







}