Teen room design planning...? i am renovating my house so im going to have a huge...

i am renovating my house so im going to have a huge room beside a walk within closet,please give me some cheap decorate ideas,i am pretty preppy.and also,what color should i paint my walls,i be thinking bright blue.
Wet room floor bed..upstairs?
Answers:    I would love to have one wall be a grey blue and the other walls be a light blue color, the unlit blue wall i would have my bed against kinda resembling a focal point of the room, this one dark wall will manufacture your room interesting and the light blue walls will breed your room clam.
Im looking for a paint,stocko,call,eifs?
Hot pink walls, neon orange hearth rug. Lime green FUNKY couches! This is my DREAM room lol. And hot pink and purple LAVA LAMPS. totally cool. good luck!