blinkbox(6x) on Linux
The text d5fb96f611c4, as Debian 11 (Bullseye) shipped it.
shows a ball inside a box.
Flags it lists
-
-blur -
-boxsize -
-delay -
-dissolve -
-fade -
-fps -
-no-blur -
-no-dissolve -
-no-fade -
-no-wireframe -
-root -
-visual -
-window -
-wireframe