Arisa this was groundbreaking for the time. If you had any concept of optical printing, you would be absolutely mesmerized at the technical proficiencies, not to mention this was produced over 40 years ago. The reason you have screens savers that look like this step down process is due - in large part - to the work of avant garde film makers such as Mclaren.
There are times in this film that I adore the primitive beauty of dance, and there are times when the human form becomes something more like a flower, or even a liquid. So simple and so beautiful--the lines of motion the body can create. It's more than a film.