how to make a door

[Zafbot]

I read the guide on db.com, but it seemed confusing to me...can anyone explain to me in simple turns how to make asimple door that opens, and closes after a few seconds?

[Kappes Buur]

http://doom.wikia.com/wiki/Making_a_door

[Mordeth]

Alternatively, open up a vanilla Doom(2) map where such a door is used and see how it's done.

[Csonicgo]

I sense a jokewad with this question.

"Be sure to treat your door with care!"