Plot Summary:Black and white rectangular images fade in and out of the screen. Their movement make them sometimes look like they're panning from side to side. Their movement also make the black and white individually change from foreground to background and visa versa.
Hans Richter's 'Rhythmus 21 (1921)' has modest enough aspirations, and I suppose it's fair to say that it fulfills them adequately. As far as "geometric shapes increasing and decreasing in size" cinema goes, this is a vaguely interesting short film that takes a simple concept and
