Camera following the player only when he's close to borders

Hi.

I'm working on a platformer. I would like my camera following the character when he reaches the first 1/3 or the last 2/3 of the window (horizontally as well as vertically).

When it moves in the opposite direction, the camera stop following it until it reaches the 1/3 of the opposite side.

Any idea about how to do that ?

Easiest Way

Well, that is an easy way !

Thank you so much !