MY KILLJOY ROOM!!!!

Killjoys! next year when my sister moves out, i get her room! ^^ which means, REDECORATING!!!! Its going to be a my chemical romance themed room, with killjoys!!! but im gutted to say, im not aloud to paint pictures on the walls! so instead im going to make cardboard cut outs of the fabulous killjoys!! and hang them above my bed, my wardrobe is going to be a better living vending machine, BUT I NEED MORE IDEAS!!! PLEASE COMMENT!!!!