“The circle,” claimed Kandinsky, “is the synthesis of the greatest oppositions. It combines the concentric and the eccentric in a single form and in equilibrium. Of the three primary forms, it points most clearly to the fourth dimension.”
This is tentatively the abstract art i'll be using. I might use something else from the same artist (Rik Oostenbroek: http://www.secretshowcase.com/). But mostly it'll be this.