After Dark is only a distant memory now, but in collaboration with Infinisys Ltd., I've revived Satori to run again. It became a part of the After Dark screensaver package produced by Berkeley Systems, along with Rose and many other modules. I originally wrote Satori in 1990, about 25 years ago. It's impossible to describe it has to be seen. The images Satori makes aren't just still frames they animate continuously, flowing and oozing color. To give you just a taste of that variety, here's another screenshot: Satori uses six different mathematical formulas in many combinations, to produce a staggering variety of images. Here's a reduced-size screenshot from Satori - this is the image used to make Satori's icon, obviously: Version 2.1.2 is compatible with OS X 10.14 and 10.15 (and should run on later OS X releases as well). Satori is a screensaver for OS X that creates flowing, meditative images based on various mathematical formulae.