menger(6x) on Linux
The text d92be6252f6c, as Debian 9 (Stretch) shipped it.
3D menger gasket fractal.
Flags it lists
-
-delay -
-depth -
-fps -
-no-spin -
-no-wander -
-root -
-speed -
-spin -
-visual -
-wander -
-window -
-wireframe