Philip Glass on Sesame Street

courtesy of yootoobsuxx
Here's a series of animations called 'Geometry Of Circles'
Philip Glass wrote the score for Sesame Street in 1979.
No info on the animator though, sorry.

This gives me hope that there's some long lost technicolor freak-out by Terry Riley about cooperation, or a cartoon with a musique concrete piece by Steve Reich that teaches you to count to 12 in Spanish.