What should I draw for the cover of my Sketchbook?

So I got a sketch book from my school , and i don't know what to draw for the cover. The sketchbook is a hard cover and black. I honestly can't stand blank things and I want to draw something on it, so Suggestions? If it helps I like bands like NeverShoutNever, Of Mice and Men, Bring me the Horizon, The Perishers, I also like edgy things but no skulls or guitars, I want something unique. Thanks!