The alternating vortex wake behind a cylinder, made visible by dye lines that are advected rather than drawn: each pixel walks backward through the velocity field to find where its fluid came from. The shedding frequency is the beat.
Drawn with: a WebGL2 shader.
Reacts to and looks like: gpu, webgl2 and wind.
Family: Visualiser.
Runs in your browser. The preview above is the same program the renderer uses.