I'd like to say, although correct, there's a lot left out
3. The area in the closet is mostly safe, unless you fall to the floor of it, you're mostly safe. You can even mess with the guard by turning on the lights right in front of them!
5.You don't need to activate the light in the spawn area, just activate the music box to bring them over, and then turn off the closet light, which only brings the guard, then go back and scare the girl with the music box and lock the closet door.