Teenage Mutant Ninja Turtles nail art design. All you need is a lot of green nail polish, toothpicks and an hour of your time.
Leonardo's mask came out too bright though, because I had only light blue nail polish at that moment.
Let the green polish dry completely before applying other colors while doing the masks.
But it is the opposite with pizzas - add the color while the base is still wet, to make it look more realistic (you don't need to worry about sharp edges here).