The impossible staircase drawn as it has to be drawn — four flights that each descend and close into a loop, with the one hidden seam the figure depends on; the beat walks the climb and a drop rotates the viewpoint off the single angle at which it works.
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.