I have no clue what waterfall is supposed to mean in a nail art world. So I did something that reminds me of falling water that is filled with sugar, spice and everything nice ;)
The base here is China glaze At vase value and over it I stamped with Mundo de Unas Neon yellow and BM402 plate. I added a cascade of particles from Silly lilly polish Let them eat cake.
I was going for something like this only with a bit less contrasting colors and not so dark - WOW those words don't usually come out of my mouth :)