Trying to open and close a door with a lever

[GraphicsKid]

I've figured out how I'm going to do it. One door is shut, with static physics, one is open, also with static physics, and also there's one with normal physics I call the "transition door". Here's what happens: pull the lever up, the door flies open. Closer look: pull the lever up, closed door disappears, replaced with the identical "transition door", which is given a force, timer activates, and in .25 seconds the transition door disappears and is replaced with the "open door". and vice versa for closing the door.

The idea is you lock a monster inside a room, then later come back and realize the door has been busted down and the monster is once again... loose!