Trouble with making a timer

Code (CSharp):

1.     IEnumerator KillZombie() {
2.         yield return new WaitForSeconds(zombieDeathDelay); // waits for zombie corpse removal delay
3.         PhotonNetwork.Destroy(gameObject);
4.         Debug.Log("Zombie Died");
5.         nm.zombieDied();
6.     }

Trying to run this code to do a timer. However, the code never acutally runs.

ZombieDeathDelay = 5f;

 

You need to start the coroutine. There are 2 ways.
StartCoroutine(KillZombie());
and
StartCoroutine("KillZombie");

The latter allows you to call StopCoroutine("KillZombie"); as the other one does not.

 

How would I make it stop as soon as the zombie dies?

 

function OnDestory() {
StopCoroutine("KillZombie");
}