Whorld is a free and open-source visualizer for sacred geometry. It uses math to create a seamless animation of mesmerizing psychedelic images. You can VJ with it, make unique digital artwork, or sit back and watch it like a screensaver. Whorld's visualization is controlled via parameters which can be adjusted manually, or modulated by oscillators. A given setting of the parameters and their oscillators form a patch. You can use the demo patches, or create your own. Patches can be grouped together in a playlist. You can play patches manually, or Whorld can auto-play them for you. Whorld also includes a crossfader, which allows you to interpolate between two patches (AKA "tweening"). Whorld is optimized for VJing. All of its functions are available in full-screen mode, via shortcut keys, mouse or trackball, and MIDI controllers. Whorld can be synchronized to music, using tap tempo, or MIDI clocks.