Norman McLaren was a very prolific Canadian animator who was born in the UK. Most of his films would be described as 'arty' and are pretty much unknown here in the States. However, I've seen several of his films on various DVD collections and I like these sorts of shorts--and was thrilled to see a seven disk set of his work. This particular short is from the first disk.
This is clearly intended as an art film and it was apparently an incomplete one for a couple decades until McLaren decided to pair this animation with a composition by Bach. It consists of lots of spheres (balls) that move about over a rather simplistic background of sky and clouds that McLaren (or someone else) painted. It's somewhat hypnotic but clearly NOT a film for the general public--more like something you'd see in a modern art museum or avant-garde show. Interesting to few, nevertheless it is well made for what it is.