So he devised a special clock , which appears in every frame , that makes one revolution per second ( based on looking at the video ) .
So he is divided into what looks like 40 sections - 4 groups of 10 .
So he devised a special clock , which appears in every frame , that makes one revolution per second ( based on looking at the video ) , and is divided into what looks like 40 sections - 4 groups of 10 .