If you watch the above video at 29seconds, there's a line that is drawn around the number 1. Many of these animations are littered throughout this video (again at ~1:02) and I'm wondering how I can create this effect in AE?
To be more specific, the main part of the animation I want to create is the "trailing" effect the line has. The tail tries to catch up with the head of the line, the tail doesn't just stay at the beginning, it follows the same path of the head of the line.
If there's a tutorial I can follow that'd be great. Sorry I don't know what this animations are called.