Quick Question.

[Wonderbread]

Alright I tested it and even if its -1 or 1 it still shuts when I'm walking towards the door that activates the monster not when i'm running away

What you can do is that the Script box is deactived at first, when the player interacts with the door and the monster is activated, the Script box is also activated, so if the player runs back, the door slams in front of their face.