Coursework - final idea

A person gets trapped in a storeroom and attempt to get out, while doing so they experience certain things like the lights going out and changing colour - building the tension. They eventually manage to escape but as they step through the door they realise they're still in the same room. It cuts to credits and then there's a final shot of a CCTV style shot being played of them in the room on a laptop which is then closed.