How to implement the logic for the tower?

Question

Unity

How the logic for the tower is implemented, namely its range. I catch clicks and when it hits the collider, I just make the radius of the tower active (this is a round 2d sprite) and everything seems to be ok, but! if a person clicks on another tower, it will also be active. How to make that if a person chose another, then the previous one turned off?

Answer 1

* Turn off learned tower
* Remember turned on tower
* Go to step 0