Decorating my room. HELP ME! :D?

Well I'm redecorating my room...AND I HAVE NO FREAKIN CLUE WHAT TO DO. I have a large black bed with white carpet (going to be wood in a while) I was going to do either a Japanese or a blue-white-red feather theme, but then I thought glow in the dark, or snowy forest (I'm a very good artist, my mom said I could draw a mural on the ceiling and walls) ...or maybe decora??...Any theme suggestions? Color suggestions? any other cool things for a 14 year old girl to do with her room? I'm open for suggestions! ANYTHING!! C: Thanks <3 Rachel