halftone(6x) on Linux
The text 44081c340525, as Debian 3.1 (Sarge) shipped it.
simple halftone pattern of moving mass points
Flags it lists
-
-count -
-maxmass -
-maxspeed -
-minmass -
-minspeed -
-root -
-sizefactor -
-spacing -
-visual -
-window