DIY CD wall hanging:-

CD
Acrylic pearl color
Pencil
Thread

Take the glossy side of the CD and paint it with black acrylic pearl color. (U can use any color u want, since the CD itself reflects colourful shades I gave black)

Give another coat.

With the help of pencil draw any desired design giving little bit pressure. The black paint will peal off as u draw..

Your hanging is ready. Glue a small piece of thread at the backside of the CD using fevicol or glue to hang.