Sims’ well-known technique for using evolving expressions to generate abstract images is paired with a co-evolutionary hosts and parasites fitness scheme to instantiate an evolutionary simulation. An added twist is that image populations are completely replaced after each generation. The goal is to identify evolutionary epochs where significant aesthetic themes emerge so that sequences of maximally fit images can be culled. Culled sequences are used to construct tilings. The technique yields abstract tilings where the interplay between creation, competition, and cooperation of visual themes combine to produce some surprising aesthetic results.