stars and nautiluses

Peggy's gonna make a bird bath with her mosaic tile art for us. I'm so pleased and so we are about the designing of it now. She has one she made herself which is truly a work of art. Cobalt blue tiles and a few other shades of blue with three gold stars at the center of concentric circles emanating from the stars. It looks like night reflected in her bird bath's pool of water. I love the concentric circles.. which look like the circles created by pebbles or stones thrown into still water. I'm thinking though of a greener set of blues with three nautilus shells at the center of each circle. It will look more aquatic.. right? Ahhhhhh...... if you were designing a bird bath with mosaic tiles, what would it look like? FUN to think about?