From http://www.jwz.org/xscreensaver/xscreensaver-5.18.tar.gz

[xscreensaver] / hacks / config / pedal.xml

diff --git a/hacks/config/pedal.xml b/hacks/config/pedal.xml
index eae2c8507c13f1fa4f3ebe705fb4438fc000b262..6f08472069aa474afa842f6b511bf8bb07f9c7f9 100644 (file)
--- a/hacks/config/pedal.xml
+++ b/hacks/config/pedal.xml
@@ -21,6 +21,9 @@
   <_description>
 A demonstration of the even-odd winding rule.
 
+http://en.wikipedia.org/wiki/Even-odd_rule
+http://en.wikipedia.org/wiki/Nonzero-rule
+
 Written by Dale Moore; 1995.
   </_description>
 </screensaver>