tcltkgrass

I was curious, so I got tcltkgrass and installed it.
Everything went fine, and starting 'tcltkgrass' I get the tcltkgrass window, and
the % prompt. My question is: what happens next? Is there anybody who can give me
a quick hint for a demo (the boss should be impressed) ?

Thanks,

             Andrea Giacomelli
             andreag@idra1.iar.polimi.it