JS condition depending on object coordinates?

Question

JavaScript

I don’t know js well, there is an animation where an object moves along a radius and stops at a certain place.
How to set a condition so that when you click on another similar object, this object continues to move in a circle and the other object also starts moving along the same radius? It turns out I need to set a condition with coordinates? It turns out that I need to create a condition, indicating the coordinates of the first object, so that the script can understand where the first object should continue its movement from? But how to arrange it? I will also be glad for any materials on this topic. Thank you.

I have attached a picture to make it clearer. By clicking on object 1 - it moves along the radius and takes the place of object 3, and objects 3 and 2, respectively, move up by 1. Thus object 3 takes the place of the 2nd, and the 2nd takes the place of the first.

Answer 1

Why do you need coordinates?
You can make it easier - put a mark 0 in the upper part of the circle (where the clock hand is 12) and measure the length of the segment passed by point 1.