Polydance explores the beauty of simple forms. How diverse can combinations of several simple shapes be? Dancing polygons on the screen that change in size, position, color and orientation create various patterns. The project Polydance is not just a visual performance, but an interactive activity for the audience as well. The graphics projected on the screen are influenced by big foam cubes that are passed to the audience. Movement of the cubes influences the shapes on the screen. The audience becomes a controller of the web-based visuals rendered in real time.