[id://Super Search] is your friend. Searching for "spinner", "twirling", "progress" yields the following...

• Term::Twiddle
• Term::ProgressBar
• Twirling baton progress indicator in Perl
• Subroutine for showing the end user the progress of the program
• Progress Bar
• Spining "stick"
• A whirleygig for a progress indicator for scripts
• making a spinner
• spinner to keep the patiently waiting user patient

(I'm sure there are plenty more, I gave up searching after only a few minutes)

Cheers,
Darren :)