Inside Collision

Thanks for sharing. Best options if that did not work is to record dragging the objects around by hand (you can use blends to get them to move in straight lines).

To use blends, you record a new X/Y position and then use the blend to move from the old to new position. https://extra-ordinary.tv/2018/10/22/project-wookie-a-beginner-youtube-playlist/  Has a couple of episodes on how to do it if helpful. E.g. episodes 9 and 11. You can add a Transform behavior to a sublayer (e.g. each object to move around).

Its not as nice, but might get you going at least.

Got it. I'll try this process. Thank you very much.

I think CH does outer bounding boxes for such effects. So what You could try to do is do two half circles, maybe with a tiny gap? Or idependent somehow? But the idea is each half circle line would then get a bounding box around that half circle, so the middle of the circle would not be included. Or maybe do a line in a full circle but leave a gap in the line so the center of the circle is not considered a part of the object.