Motion AftereffectThis may take a minute to load because the movie is big (it will be smaller in future versions).
What the movie shows: You should see concentric rings, which recede in the movie.
What to do: Stare at the centre of the rings for about a minute. The click on the movie to stop it, or simply look at anything else. Whatever you look at should seem to expand!
If you want to start the movie again just reload the page (click the reload button on your browser).