Phosphoria

Phosphoria turns your Apple TV into a kaleidoscope. Forty-two drawing algorithms take turns on a mirrored canvas - stars, spirals, arches, ribbons, lattices, fountains, tessellations - three to nine of them layered on one screen at a time. When the picture is finished it holds for a moment, and then one of twenty-four fades takes it apart: some dissolve it, some slide it off the edge, some scramble it into confetti, some drip it down the screen like wet paint. Then a new palette is mixed and it all begins again, and it never repeats. Nothing here is a video loop. Every line and every fade is drawn live, and the pace is the point: these algorithms were written for a 386, and Phosphoria draws at the speed of the PC you choose - a 286, a 386SX, a 386DX with or without its maths chip, or a 486 - slowly enough to watch a shape take form, mark by mark. The colours come from 256-entry VGA-style palettes, made fresh for every screen and cycled continuously, which is why a still picture keeps moving. - 42 image algorithms and 24 fades, all named, all separately switchable - Auto mode watches itself; Semi-Auto lets you pick an image, draw it by hand, and fire a fade - Choose the PC it runs on: 286, 386SX (the default), 386DX, 386DX + 387 or 486DX, each at its own measured speed, with a finer speed adjustment on top - Classic 4:3 or Expanded 16:9 - the widescreen canvas is genuinely wider, never stretched - Classic, HD or 4K. At HD and 4K every curve is rasterised at your television's own resolution, so shapes are smooth while keeping their original weight. Classic keeps the chunky blocks, with a choice of how they are enlarged. - A configuration screen that starts simple - layout and resolution - and opens up on request to the full set: machine, per-image size, which fades may run, images per screen, pause time, colour cycling speed and drawing speed - Works with the Siri Remote, and with a Bluetooth keyboard if you want the original key layout - No account, no network, no advertising, no data collection of any kind Inspired by a 1990 shareware screensaver for MS-DOS by James R. Shiflett. Phosphoria is an independent reimplementation; it shares no code or assets with that program and is not affiliated with or endorsed by its author.