I want my walls to look like water, almost Monet-like.  Like this layering of blues and greens.

18 Decorative Ways to Paint Your Bedroom Walls

If you are new to decorative painting, sponging is a great place to start. Sponge on glaze or sponge off glaze to create the custom look perfect for you. To cover a larger area in less time use a sponge roller in place of the natural sea sponge.