The wheel program draws a color wheel, roughly similar to the Mac
widget.  It demonstrates advanced graphics transformation (including
font rotation) and HSV to RGB color conversion.

Drawing the first text may take a little time on some X servers.  The
reason is that the server loads the font on demand.  When a server
loads a font, it creates bitmaps for each character.  Try starting a
second wheel application.  Then the font is already loaded by the
X server and the drawing will appear immediately.
