I need more information:

How many spherical objects you want (maximum)?
And they are all reflected object, right? (act as mirror)
Do you want all the objects have the same x coordinate (aligned) or their position can be anywhere (use mouse drag and drop)?

I will assume objects are not overlapping? 

May I know what is the purpose of your project?
Tell me more about what you really want to do so that I can create simulation better fit what you really want.