Room Decorating Ideas? Please help!?

I get this quilt: http://www.pbteen.com/products/p3763/?pkey=cgirls-duvet-covers either with the purple walls or yellow color (pale suggestions on this?) I really need some space to decorate a touch of color (many) and make my room more beautiful. I like red, violet. but not much. Can be green or something? Suggestions? Currently I am brown furniture, a chair stuffed green, purple carpet, a closet and a bathroom. I have 13 years of age. In that time I recorded a couple of photos my walls and hung some signs my friends have done on my doors. is that in bad taste? Thanks for helpingg!

u must look like a piece of money or something disign THT. and my pictures of friends, I put on my door so do not really do anything in my room, but I still hang. and I think u should have yellow walls, bus rillllly yellow and purple go well together. u should decroations be like a flower to match ur wall quilt. And red and purple go together, but purple and green, but yellow is better!

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