About the Show
(works with any even number)
The line unfolds from the middle and collapses into a file in the first half of the move, then opens back up into a flat line with the order reversed in the second half- basically the center of the line pulls up and down while the ends push in. After hitting the file, the top ends push in towards the center of the file while the middle pulls out horizontally. If you freeze the move halfway through either part fo the move, you'll have a perfect square.
The patter goes like this:
set 1 - 12345678
I show the move four times- first at small intervals/slow speed, then small intervals/full speed, then again at larger intervals so you can see how the pattern works more easily,