Here it is a super easy tutorial showing you how to dye your hair using crepe paper.
You can watch the video or follow the steps, enjoy :)
Step 1: Step 1
Step 2: Step 2
Step 3: Step 3
Step 4: Step 4
Step 5: Step 5
Step 6: Step 6
Step 7: Step 7
Step 8: Step 8
The time is very important! In this tutorial I waited for about 20 minutes but it wasn't enough (yeah, my hair wasn't green anymore, but the final color was a very light pink instead of purple).
To gain a better result you need to wait longer and add more pieces of crepe paper :)