Looking for an old TV Spot

When I was a kid in the 70's, there was what I think was a hippie PSA (or maybe a commercial for something). The lyrics went something like this:

Hear the world's heart beating
Like a big bass drum
Can't you hear the people something
It's true
It's the tapping of a million shoes.

So, hey, take a look around!
You can see it in a different way.
Say, hey, take a look around
You'll have a different point of view...

Any ideas? Leave me a comment...

EDIT: Might even be the intro from a Saturday morning TV show.