hilbert(6x) on Linux
The text 88f764f18dd2, as Debian 10 (Buster) shipped it.
3D Hilbert fractal.
Flags it lists
-
-2d -
-closed -
-delay -
-fps -
-max-depth -
-root -
-speed -
-spin -
-thickness -
-visual -
-wander -
-window -
-wireframe