I didn't know I was lecturing you, I was just stating the obvious. When you work with a different program, the program will be different.
Instead of complaining about C2 you could have just asked your question.
short approximate answer to your question:
put the object in a family.
for each object
system compare two values: distance(object.x, object.y, family.x, family.y) < 128
and add your move action.
I hope trying to help you will not result in another useless rant in which you accuse me of things that aren't true.