How do I make sliding doors?

So here is the scenario:

Imagine a 2d side-scroller.

A door is blocking your way

However, activating a lever makes the door slide up, sort of like a garage door.

How would I go about programming that sliding-effect?

Right now the best I've got is a gimmick where activating the lever activates 8-direction UP control.

And when the door is overlapping an "Doorstop" object, the 8-direction control is ignored again.

I've got a picture in the attachement.

If Door is Open & Door.Width is greater than 0 -> Set Door.Width to (Door.Width - 50*dt)

You can reverse this by setting a target width for it to grow to when the player toggles the door.

Alternatively, instead of setting width, you can set the X or Y position of the door so it slides instead of shrinks.

thx, will try it out!