in reply to Tk programming style

I like the idea behind your code! I think that timers should count down towards zero, like a kitchen timer or a chess clock. Clocks should run forward.

I prefer analog displays for clocks, and I wrote a Tk lab timer to prevent burning my food while reading Perlmonks!

It would be cool to have multiple independent clocks in one window, with options for which direction the clocks run, and control over how fast the hands spin.

I also like command-line options to be available, so I can type instead of using the mouse.

It should work perfectly the first time! - toma