🚀 go-pugleaf

I've had this idea to take a LED clock and make it display something other than
the time, but I don't know much about the things enough to rip it open and
experiment.  Does anyone know how I could go in and change the display, most
likely not even using the clock (I want a constant display or else something
that would change every minute between a couple displays).  Can anybody tell
me how to go about doing this?  (How is the display controlled, what would I
have to do to change it, etc).  How about a clock that would go backwards,
only giving the correct time at 12?  Anyone?  Any hints?
************************************************************************  |  |
Russ Perry Jr   perry@garfield.cs.wisc.edu   "Feed my brain with your so  ||||
5970 Scott St   824 Perlman, Sellery B        called standards; who says   || /
Omro WI 54963   Madison WI 53706         that I ain't right?"--Metallica     /