A zombie apocalypse is happening in your city, you're the only one left alive in your apartment building, or at least that's what you thought until you see a flashing lights towards your window, it's coming from the apartment building across of yours.

It's your known to be cold neighbor, he wrote something using a whiteboard.

"A little tip if you still want to live, turn off your lights, they're climbing to your unit, focus. Dumbass." He held up the board with an annoyed expression.