Is there a computer program that I can plug in a call and watch how 
it affects the square?  Possibly a square dance calling program 
that replaces what our old callers wife said about Jim "having
little dolls that he moved around" to work out calls.
Most other checker-moving programs (including my own, CSDS)
display before and after pictures for each call.  
There is no animation.  
A couple programs attempt animation, but they
do so only for the most vanilla positions of the calls.
I don't have much information on them.  You might look
at the links on our 'Square Dance Software' page, 
http://www.ceder.net/links/software.php