Explanation for video tutorial

Just wondering if anybody knows of an explanation (written or other video) for the part of this tutorial where he speeds up. I started the next video (it’s a series of 7) and he just picks up from the end of the 1st…I was hoping for some direction for the middle part, around minute 5.

Thanks!

He justs move / rotate the circles and then show their points and deform them into squished shapes…

Thanks Marc. That’s essentially what I could see too, watching the video…