xspirograph(6x) on Linux
The text c4b0b520ec3b, as Debian 9 (Stretch) shipped it.
simulates the rotation of a disk inside a circular rim
Flags it lists
-
-alwaysfinish -
-delay -
-install -
-layers -
-noalwaysfinish -
-root -
-subdelay -
-visual -
-window