First, take your white nail polish.
Apply it. It doesn't have to look perfect(or even good) because as you can see mine arent done very nicely
After the first coat dries, add another coat of white on top of it.
Take your three nail polish colors
Apply one strip of each color in the pattern you want
Apply to nail
This is what it looks like on
Apply top coat
After that grab your nail polish remover and a cotton swab and get rid of the stuff on your finger
This is what it looks like finished