blinkbox(6x) on Linux
The text b5b421d63b72, as Debian 9 (Stretch) 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