A wall of thick pillowed glass blocks, each refracting independently, with a different index of refraction per channel so the room behind visibly disperses toward the block edges. Behind the wall the light bars are the spectrum.
Drawn with: a WebGL2 shader.
Reacts to and looks like: gpu, webgl2 and glass.
Family: Visualiser.
Runs in your browser. The preview above is the same program the renderer uses.