I'll have to say that I was pleased with the way this turned out! It's slightly messier then I envisioned, but it was close.
For all details on the challenge and to see the other entries please visit http://mommylovesnailpolish.com/.
Polishes used for this challenge:
red - Quo by Orly Red Hot
orange - Quo by Orly Orange Pop
yellow - OPI Candle Light
green - OPI Jade is the New Black
blue - OPI Dating a Royal
purple - China Glaze Grape Pop
I did this over a base of OPI Alpine Snow matte to help the colours pop.
Applied using a dotting tool.