you could use collision detection so they won't go over the edge of the big sphere.

it's an interesting exercise. would be kewl idea to make for free stuff

i would type in the x and z parameters for precision placement.

starting with the spheres at origin 0,0,0

select one, x= 3, (or whatever your distance)
select 2nd, x= -3
3rd z = 3
4th z = -3

the others, hmm. what equation to use?

don't think the slope formula would help here, y = mx + b

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