xhangglider - fly hanggliders and paragliders on your X root window.
xhangglider is a demo program for X. Hanggliders and Paragliders com‐ posed of polygons fly around in the root window. /usr/share/doc/xhangglider/README
This manual page was written by Yasuhiro Take <firstname.lastname@example.org>, for the Debian GNU/Linux system (but may be used by others). March 11, 2000 xhangglider(6)