xclock as screensaver?

I like using clocks as screensavers. Under Win some years ago, I found a
nice digital clock with all kinds of configuration options like character
color, etc. Under Linux, the closest thing I found to that was xdaliclock.
I'd actualy prefer an analog clock though, and the only thing I've found
so far is some sort of morphing analog clock made up of balls that moves
around the screen. It's kind of hard to read. I would much prefer to use
the old-fashioned xclock (e.g., what you get with xclock -norender -fg
purple -hl purple -bg black). I was looking at something that made me
think it might be possible to use xset to make xclock function as a
screensaver at
http://www.penguinsecurity.net/pensec/modules.php?name=News& file=article&sid=16
, but my tests based on that article were unsuccessful. Likewise, I tried
editing ~/.xscreensaver and adding xclock as an entry, since the man page
seems to indicate xscreensaver can run programs. But that did not work, I
think because xclock doesn't accept the -root option. For xscreensaver to
use a program, it apparently has to be able to display on the root window.

In short, I've come up empty-handed in my attempts to get the
old-fashioned xclock to function as a screensaver. Can anyone offer tips
that might lead to success? Or is it just not possible to use the
old-fashioned xclock as a screensaver?

Thanks, James
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