How do you get a whiteboard ending?

The Whiteboard Ending occurs <b>when the game restarts and the office is blue-ish</b> and you are able to open Room 426.

Question

The Whiteboard Ending occurs when the game restarts and the office is blue-ish and you are able to open Room 426.

Hagrid P Hazard · Accepted Answer

The Whiteboard Ending occurs when the game restarts and the office is blue-ish and you are able to open Room 426.