OK this is what I’m looking to do and I’m not sure it’s possible in Rhino. I want to draw 4 tangent circles (each circle touching 2 other circles tangent to one another, see diagram).

I want to group them in such a way so that if 2 of the circles are pulled apart the other 2 circles will still be tangent, i.e. if I pull the top and bottom circles apart the two side circles will move closer together, but still remain tangent to the top and bottom circles.

Or if I take the left and right circles and move them a little further apart then top and bottom circles will move closer together so all 4 circles remain connected.

Does that make sense the way I worded it?

at about 3.50 in the youtube video you can see what I mean by moving the circles apart and having the others move to compensate.

Thanks

Steven