does everyone know this already...I use fluxbox but you can do this in xfce-
set an xscreensaver as wallpaper
First click menu, go to settings, desktop settings
uncheck the box - allow xfce to manage the desktop - and close
then click menu, terminal and type:
/usr/libexec/xscreensaver/rocks -root &
minimize the terminal
use menu as usual
close the terminal and recheck the box in desktop settings and things should be back to normal.
although you may choose an alternate saver keep resourses in mind
You do not have desktop icons to double click but there are lots of ways to conviently comput with out double clicking destop icons.