[Alan Anderson]

Do you want to hold down a button to make the door go up and hold down another button to make it go down, with the door stopping if neither button is pressed?

Or do you want it to act like a commercial overhead door and go all the way up (or down) after a short tap on the up (or down) button, and go automatically to the middle and stop there when a third button is tapped?

The first one is easy, almost trivial. The second one takes some careful program design and an appropriate set of feedback sensors on the door position.