It's never really been done on Gmod workshop before, I think a FNAF4 Events map would be great!

The way it could work is player flashlights are disabled, while bedroom doors are opened there'd be a floating button which can be pressed to activate the flashlight in the hallway, the hallway nightmares will have a timer where they are peaking down from the corner of the hallway and if they are flashed before this timer ends they'll hide and reset, if they aren't flashed in time they'll teleport to the doorway and make a breathing sound, the door must be closed within a short period of time to reset the hallway nightmares or they'll jumpscare anyone in the bedroom. Doors will only remain shut for a very short period of time but just enough for the nightmares to leave.

Closet Flashlight: There will be a floating red button in the closet which can be used to keep nightmare Foxy at bay, if the foxy plushie has been unchecked for too long then it will dissapear and Nightmare Foxy will appear inside within 10/15/20 seconds and you must close the closet for him to reset back to plushie form, just like the beds the closet can only be kept closed for a short duration of time.

Bed Flashlight: There will be a floating button hovering above the bed, if the bed is unchecked for too long a Freddle will appear, after a certain amount of Freddles appear on the bed Nightmare Freddy will replace them and jumpscare you.

Hiding: If a nightmare has been waiting at your door or closet for too long they'll peak into your room causing the lights to flicker as they make a loud breathing sound, there will be a blue button at the foot of your bed on the ground, you can press this button to hide beneath the bed while the aminatronics are peaking in, however Nightmare Chica's cupcake can snuff you out while hiding if Chica was peaking in. Freddy will also have a duration where he is emerging from the bed which will cause the lights to flicker and he will the deep amplified breathing sound, you can hide before he kills you here.

Easter-Eggs:

Fredbear Ambush: You'll hear a Fredbear laugh and there's a 50/50 chance you'll see Fredbear charge at you down the left hallway or Nightmare charge at you down the right hallway and you have to close the door before they reach you.

Plushtrap: You can play the plushtrap mini-game in-between nights.

Nightmare Springbonnie: If you beat the Plushtrap minigame 3 nights in a row there's a chance that Nightmare Springbonnie will peep at you through a hallway window.
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2995563368&searchtext=nightmare+springtrap

Nightmarionne: There's a chance Nightmare Puppet will stare at you through a hall window.


FNAF4 Models
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=545767347&searchtext=freddy