Under Resources at the bottom you can download a 9MB File (aay1950_movie_s1.mp4) of movie S1, but it only shows an animation of a disc running on blue, green, a

Under Resources at the bottom you can download a 9MB File (aay1950_movie_s1.mp4) of movie S1, but it only shows an animation of a disc running on blue, green, and red springs...