const int reverseButtonPin = 2;
const int forwardButtonPin = 3;
const int stopButtonPin    = 4;

const int relayForwardPin  = 5;
const int relayReversePin  = 6;

void setup () {
    Serial.begin (9600);

    pinMode (reverseButtonPin, INPUT_PULLUP);
    pinMode (forwardButtonPin, INPUT_PULLUP);
    pinMode (stopButtonPin,    INPUT_PULLUP);

    pinMode (relayForwardPin, OUTPUT);
    pinMode (relayReversePin, OUTPUT);
}


void loop () {
    if (digitalRead(reverseButtonPin) == LOW){
      Serial.println ("reverse");
      digitalWrite(relayReversePin, LOW);
      digitalWrite(relayForwardPin, HIGH);
    }
    if (digitalRead(forwardButtonPin) == LOW){
      Serial.println ("forward");
      digitalWrite(relayReversePin, HIGH);
      digitalWrite(relayForwardPin, LOW);
    }   
    if (digitalRead(stopButtonPin) == LOW){
      Serial.println ("stop");
      digitalWrite(relayReversePin, LOW);
      digitalWrite(relayForwardPin, LOW);
}
}