Reason: to show 24-hour time on a 12-hour clock face. Since the hour indicator moves along the edge
of the Mobius strip (try Fast Mode for demo), it must make 2 full turns to return to its starting
point, thus showing the 24-hour time: Noon is at the bottom of the upper arch, and midnight is at the
top. Turn on the hour labels to see the hours.
The minute and second indicators move along the center of the strip, so they complete a cycle in only
one turn.