Need HELP!!

Hi I'm a new coder and need help.
I'm trying to play a ads after 3 deaths. So I have a variable and when i die I increase that variable by one so when it reaches 3 it will play ads. But the after you die it reloads level and the variable always resets to 0. Does anyone know a way around this.

Code (CSharp):

1.  if (collisonInfo.collider.tag == "Obstacle")
2.         {
3.             Debug.Log("We hit an obstacle");
4.             movement.enabled = false;
5.             deathNum = deathNum + 1f;
6.            
7.             if (deathNum >= 3f)
8.             {
9.                 FindObjectOfType<GameManager>().PlayerAds();
10.                 deathNum = 0f;
11.  
12.             }
13.             Debug.Log(deathNum);
14.             FindObjectOfType<GameManager>().EndGame(); // where I reload game
15.            // FindObjectOfType<AudioManager>().Play("PlayerDeath");
16.         }  

 

Quick solution is to make the variable static.

Code (CSharp):

1. static int deathNum;