Trap room with gas leak resulting in uncon.

[Astronauth-e12e430adb6a88eb 0]

Hello,

I have been thinking about one particular script that would basically do this:

Players on dedicated enter the room or building. After a short while room locks and entraps players inside. Gas enters the room. Players without gasmask fall unconscious.

After that I can capture and teleport them to the torture room (via zeus), from which they have to escape by solving puzzles and playing as team. - that is my mission idea.
I have found this compilation (no mod required) which seems to function nice and I bet it can be modified not to kill players but uncon them.
https://steamcommunity.com/sharedfiles/filedetails/?id=2711516635&searchtext=toxic+cloud

However I am not experienced scripter.

Any ideas ?