piecewise(6x) on Linux
The text e841c8b846dd, as Debian 12 (Bookworm) shipped it.
lots of moving circles intersecting in interesting ways.
Flags it lists
-
--colorspeed -
--count -
--db -
--delay -
--fps -
--maxradius -
--minradius -
--ncolors -
--no-db -
--root -
--visual -
--window -
--window-id