SEARCH BUTTON! Dont tell me you have tried it because you clearly haven't!
A god damn door tutorial has been posted god knows how many times. Give me a sec and I'll find you one!
EDIT: It would appear that the one I was refering to has been deleted or Pruned! So i'll tell you now since I have nothing better to do!
First make the event with your door and stuff, set it to action key!
Now copy this into your event commands.
<>Move Event: This Event
<>Play SE: Door Open (Or whatever you want)
<>Change Graphic: Door2 (This is just the door partcially open)
<>Wait 2
<>Change Graphic: Door3 (The next frame of the open graphic)
<>Wait 2
<>Change Graphic: Door4 (sma e as above)
<>Wait 2
<>Teleport: (Wherever the door leads to!)
Thats as easy as anyone can put it!