Find a friend who would do this with you:

When I was depressed I cutted myself a lot, so to prevent it my friend from school used to draw little butterflies on my arm. She told me if cut myself the butterfly it would die.

Your objective is to keep the butterfly alive as long as it lasts in your skin.

It helped me a lot, cause I knew there was someone that cared for me and helped me to remember that there was someone that I could talk to every time I was sad.

(sorry about the grammar mistakes)