Room decor ideas!! I have a bad imagination! lol help?

so, if you have one of those wood things that goes around the walls of your room and splits the wall (I don't know what its called) , I would put wave wallpaper on the bottom, and lime green paint on the top, with Hawaiian flowers and colors for your bed duvet or comforter, and some shells random places, like on your window sill, hanging in a cute colored hollowed out lantern hanging on your wall, or on strands on the wall or (if you have them) around your bed posts. Oh, put some cute turtles and tropical fish things places too. Then, in the hang part of the room, put a comfy low couch, and some bean bag chairs (a classic fave) and if you have a T.V., get a console where you can store movies an a D.V.D. player. Ah, I can see it now...