How do i make the game freeze on collision

im trying to make a game where when you collide on an object the game freezes

 

Dude, are you serious? 5s in Google.

In 25s I see that it is enough to set e.g. time scale to 0. I don't know how to make time scale to zero? Unity manual https://docs.unity3d.com/ScriptReference/Time-timeScale.html.

So now I must only detect collision and set in method

Code (CSharp):

1. Time.timeScale = 0.0f;

And I'm not playing omniscient here, I didn't know it myself a minute ago.