What does that mean?

[Cruzore]

You need even more than that, or the door closes right when you actually enter the map. Actually, that's even the wrong command. For first, I'll point you to a site on the wiki. It has every thing you need:
http://wiki.frictionalgames.com/hpl2/amn..._functions
use ctrl + f to search for a command. search for setswingdoorclosed to see a explanation what asname, aslocked etc. means.
Now for the close behind you part:

place a script area at which point the door should close.

then, add this to OnStart():

AddEntityCollideCallback("Player", "yourscriptareanamehere", "CloseDoorFunc", true, 1);

Then, add this anywhere not inside a function:

void CloseDoorFunc(string &in asParent, string &in asChild, int alState)
{
SetSwingDoorLocked("Doornamehere", true, true);
}

Maybe you can use some sounds for the slam, and some sanity drain.