Meanwhile, don't stop at one hundred. Keep counting! Follow a simple rule: When you get one token too many, pass it to the left and clean up the overflowed position. If the token passed to the left happened to become one too many again, pass it to the left and immediately clean the position again.
Click to pause the counter at any time. Click to make it slower or faster while it's running.
Counting after after 100 is easy: it's just more of the same except for few new words and images. Clocks, books, measuring tapes, movies are ready to help.