I wrote this for another question too, but it never gets old.
I really don't know what kind of style you want so you should be more specific. But I'll go with retro.
Colors: Lime, watermelon pink, hot pink, tangerine, citrus yellow, and eye popping blue.
Use BRIGHT neon bedsheets or bedsheets and curtains that go with the colors you chose.
On your walls you can put paintings of clowns, flowers, peace signs or just retro shapes.
You can fill up a vase with mums, and Daisies.And maybe stamp on pictures of flowers or peace signs.
For extras you can stamp peace signs, butterflies, or retro shapes onto your wall with sponges or just paint them on regularly if you want.You can also add a bean bag chair, or a bubble chair.
For more you can go to your local library and check out room crafts or DIY crafts.HOPE this helps!
