I NEED HELP with painting my bedroom....? PLEASE?

Question:Well, i had this really cool idea, where i painted every wall (i have 4 walls) a different color, but contrasting colors. ALso, I'm only 13, so i can do this kind of thing. Anyways, my mom thought my designs were too funky so she didnt let me do it(so sad). so i have another idea thats not AS "funky". for one of my walls, the base color will be light purple, and it would have dark purple and white polka dots. Another wall is gonna be light blue with dark blue swirls I dont have any designs for my other 2 walls, and i only have one color (green). Can anyone think of designs that would look cool on green, and another contrasting color with a cool design for my other wall? PLEASE!?!?!?!?!?

Answers:
How about lime green with dark green diagonal stripes?