I started with one coat of Rimmel Grey Matter for base coat. Then I added a coat of Nerd Lacquer Don't Blink (I really should have taken a picture at this point but I forgot!).
Here's the rest of the colors that I used:
Clouds: Nina Ultra Pro Ink-Ling
Lightening: mixed Maybelline Sunshine and Sinful Colors Let's Meet
Raindrops: OPI Fly
Umbrella: OPI Don't Mess with OPI and mixed with white for details