A lattice whose third band is exactly flat, because an electron with alternating phase around one hexagon has every escape route cancel — infinite effective mass by geometry alone; the Fermi level rides the music and the compact localised states light up when it lands on the flat band.
Drawn with: a WebGL2 shader.
Reacts to and looks like: gpu, webgl2 and audio-reactive.
Family: Visualiser.
Runs in your browser. The preview above is the same program the renderer uses.