I'm using Perl 5.8 on an Windows platform.
Tk provides a lightweight timer mechanism that can call
back a procedure after a specified delay (specified
in milliseconds) - the 'repeat' function.

I'm trying to track different tasks with timers.
I want to run concurrent timers, but it seems that
when I try to run more than one 'repeat' function,
only one runs, while the others are paused. I haven't
seen any documentation that says it works for more
than one.