If yall are having problems beating 4/20, don't use the lights. Chica and Bonnie will make sound cues(hoping you have an audio balance on your pc)when they reach your office(its the sound of them walking). Keep the camera on Pirates Cove(or Booty Cove XD) and just flip from time to time(I just did 5 second intervals). Freddy will laugh, for a total of 5 times, indicating her movement towards your office. Close the door on the 5th time, and keep it close until she laughs again. Now heres the problem. She will then only switch between 2 rooms after she leaves, so now you close the door whenever shes at the room near your office(it should be every other laugh but it may vary). Now you just hope she doesn't stay long enough to drain your power XD.