First put on your base color (try to pick something light) I chose white
Put tape in the middle or like a slide I'm doing the middle. You can cut the tape into any shape or form you want just don't do it too thin
It's not really that visible but I did put tape on
Now pick 2 colors & color the top 1 color & the bottom another color
Remove tape & put clear on
TADA!! You are done!! Try other color combos like blue & purple, pink & green , Yellow & orange.