How to decorate a scene teen bedroom?

well i have a very small room. I can not paint my walls. so they are white. all of my wicker furniture was painted black last weekend. i am into the whole scene, music, emo, indie type deal. i have a piano keyboard thing, a vanity with a mirror, a dresser which i put my tv on and a bed. i have this horrible cream colored splotchy carpet and cannot use wallpaper either. this is my bedspread. i just got it and i am going to use it - http://www.bedding.com/product/kids-bedding/690153/bed-ink-beautiful-love.html