rings.icn: Program to draw tiles of rings and circles

July 13, 1994; Gregg M. Townsend
Requires: Version 9 graphics
This file is in the public domain.

This program produces seamless tiles with drawings of circles and

It words from characters input to the window:

     q       quit
     c       draw 10 random circles
     r       draw 5 random rings
     W       writes image to GIF file; files are named ring000.gif,
                ring001.gif, ...
     E       erases the window
     F       fills the window
     R       reverses the colors

At present there are no options except those provided for
opening the window.

Some modifications have been made by Ralph E. Griswold

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