TIME CIRCLE

inspired by
単純なタイムカウンター by meat18
http://wonderfl.net/code/30bfd97212e7fc7c27a496b63938af1efa147460
Z ...... start
X ...... pause
C ...... stop
UP ..... increase cycle
DOWN ... decrease cycle
The inner circle takes 1000 msec to wane, 1000 msec to wax.
So the cycle of the inner circle is 2000 msec/rev.