Freddy moves based on the time. You don't have to watch out for freddy at all until its around 4/5 a.m. Around those times you'll hear her laugh again and that's when she appears in the room to the right of your office on the cameras. For example, she'll be in the closet after I think about three or four laughs in total, and you're safe from her at that point. After you hear one more laugh after she's in that closet, you're no longer safe with your right door open at all unless you're watching her on the camera. So the strategy is when she's in that room, you HAVE to close your right door when you're checking foxy or any other room but can open the door when your done and immediately go back to freddy in that room on the camera.