The Range constraint lets you influence a constrained object using one or more pulling objects.
The Range constraint requires the following objects:
Constrained object
Object being pulled by the pulling objects. Also known as the “Child” object.
Source
An object defining the limit or maximum range that the constrained object can be pulled. Also known as the “parent” object.
The limit is a radius centered on the pulling object.
Pulling object 1
Pulling object that affects the constrained object.