I started off with two coats of China Glaze Shower Together, then went through my blue/green polishes and with a dotting tool, added random dots. I used China Glaze Watermelon Rind and Dorothy Who?; OPI What's With the Cattitude?; Elf Mint Cream; Zoya Charla; Xtreme Wear Pacific Blue, Blue Me Away, Ivy League, and Green With Envy; and a Sally Girl polish without a name. Obviously any blue or green dots works as well.
Shower Together is a bit greener than this pic and slightly darker.