Fill a surface with circles using an attractor in the center

hi,
I was wondering if there is any way to fill a flat surface with circles that touch each other (not overlaps) of fixed radius.
I was thinking using circle packing studies and an attractor like this:

Simulating an attractor point in the center of the surface, and slowly filling it while the surface is not filled fully.

I try to download it, but it is using an old kangaroo and I can’t find it.

Thanks

Old kangaroo is here: https://www.food4rhino.com/app/kangaroo-physics
Pick the 0.099 version, down in the list.

Here are various circle packing examples using the current Kangaroo:


In particular the first two there - CirclePackOnSurface, and CircleFill_Dome_tangentboundary
The discussion where that second one was first posted is here:

Thanks, where I should specify the location of the KangarooSolver?. Because when I open it, it does not ask me where to place the location.

Right click the SphereCurveCollide component and select ManageAssemblies
If you are using Rhino 5, the KangarooSolver dll will probably be somewhere like:
C:\Users\YourName\AppData\Roaming\Grasshopper\Libraries
but if you are using Rhino 6, it will be something like:
C:\Program Files\Rhino 6\Plug-ins\Grasshopper\Components