@twiligh44250940 @sharkbunz the similarity of mobius strip &amp; :
traveler starts at point a. in 1 round of travel, the traveler will back at point a but flipped upside down. if the traveler continue 1 more round, the traveler will back at point a (un-flipped back). repeat.
~&gt; infinity https://t.co/4ojwijz4ku