I started with a layer or two of OPI Nail Envy then sponged a layer of LA Colors BCC 656 (white) onto the nail from the tip to about 3 quarters down. Next came a layer of grey (Sinful Colors Slate) that was sponged down about halfway down the nail. Sinful Colors Mint Apple was sponged throughout the grey and a little further into the white. I repeated the colors (white, grey, green) until I'd built up enough color that it was opaque but had maintained the white at the bottom to look like the wave touching shore. I came in with a fan brush and Orly Sparkling Garbage to dab in some glitter without covering up the detail before topping each nail with 2 coats of Seche Vite.
Normally, I don't prefer individual finger pictures but I couldn't get my camera to cooperate to show you the detail without it. Sorry!