How do I limit an objects range of movement or "tether" it

I guess the best way to describe what I'm trying to trying to do is have an object with 8-way motion but to limit its range of movement - similar to a pet tethered to a pole by a leash. This would allow it a radius of space to freely move around but it can only move so far away from the pole.

Any ideas are appreciated.

Here is the easiest way to do it:

dop2000

Thanks, this example works exactly how I asked.

I also have more complicated scenario and wondering how this code would translate to it. I'll use a similar analogy.

Imagine a person walking a dog. The person has a free range of motion and is controlled with 8way direction and can go anywhere. The dog also can be controlled with 8way direction (like a two player game) but is limited by how far it can move away from the person because of the leash.

So basically how to 'tether' a moving object to another moving object?

sean080

You can do it exactly the same way, only instead of LayoutWidth/2 and LayoutHeight/2 use person.x and person.y