crystal(6x) on Linux
The text 4bb1922bce8c, as Debian 10 (Buster) shipped it.
kaleidescope.
Flags it lists
-
-cell -
-centre -
-count -
-delay -
-fps -
-grid -
-ncolors -
-no-cell -
-no-centre -
-no-grid -
-nx -
-ny -
-root -
-visual -
-window