pbmmake [-white|-black|-gray] width height
You can abbreviate any option to its shortest unique prefix.
This program is part of Netpbm.
pbmmake produces a PBM image of the specified width and height, either
all black, all white, or a dithered gray. The default is white.
In addition to the usual -white and -black, this program implements
-gray. This gives a simple 50% gray pattern with 1's and 0's alter-
pgmmake, ppmmake, pbm
Copyright (C) 1989 by Jef Poskanzer.
netpbm documentation 13 December 2003 Pbmmake User Manual(0)