How do you design a teen girl's bedroom in a very small room with a sloped ceiling?

wals= 4meters by 3meters or less

FURNITURE:

vanity table,

desk

comfy bed/loft bed/bunk

big closet

full length mirror

comfy seeting, pouffes/fatboy

carpet

bookshelf

drawers

COLORS:

2 walls purple

1 wall light blue

1 wall white

DECORATION:

bullitin boards

pictures in frames

nice curtains/blinds

fairy lights

posters

mirrors