Guessing this is where you spotted things:

http://www.imdb.com/title/tt0231461/reviews

Weird early example of computer animation, 10 February 2006

Author: Alex Gifford from Australia

My friend and I obsessed for years over the identity of the short film we saw, whenever we went to see 'Return Of the Jedi' in the UK in 1985. I remembered the images of the Easter island Head being shot and he remembered the bigger fish swallowing the smaller fish and so on... After a through search I managed to track it down on DVD - and I was not disappointed!! The 'story' is simple, the film tells of the developments of man, and how all we are doing is inventing new and bigger machines and working towards war and our own destruction. But, it's the imagery that always sticks and the often very strange soundtrack. The film was applauded on it's release as it used computers for animation for one of the very first times (how things have advanced), but I remember it as the short film before 'Return Of The Jedi'. Having finally tracked it down I was able to fully relive one of the moments of my youth - and it was good!!