int buttonPin = A7;
int buttonValue = 1;
int currentState = 0;

void setup() {
  pinMode(buttonPin, INPUT_PULLUP);
}

void loop() {
  buttonValue = digitalRead(buttonPin);
  if (buttonValue == LOW) {
    if (currentState == 0) {
      currentState = 1;
      // WRITE YOUR MOTOR CODE FOR POSITION 1
    }
    else {
      currentState = 0;
      //WRITE YOUR MOTOR CODE FOR POSITION 2
    }
  }
}