I had a boring purple shirt I wanted to revamp so I found a picture of a cut out skull on a pair of leggings on pintrest as my guide. I liked the skull design so I just mimicked it.
I used a sharpie to outline the design the took the scissors am cut away. It took me like 10mins-uber easy.
I cut off my sleeves to so it's a tank.
You can find me on pintrest if you want to see the photo of the skull I used (my creative side board).