Time for action – detecting bullet collisions

Now that we have our loss condition, it's time to add in a way for our player to fight back and survive enemy attacks.

Open up EnemyBehavior and modify it with the following code:

 public class EnemyBehavior : MonoBehaviour 
 {
     public Transform player;
     public Transform patrolRoute;
     public List<Transform> locations;
 
     private int locationIndex = 0;
     private NavMeshAgent agent;
 
     // 1
     private int _lives = 3;
     public int EnemyLives 
     {
         // 2
         get { return _lives; }
 
         // 3
         private set 
         {
             _lives = value;
 
             // 4
             if (_lives <= 0)
             {
                 Destroy(this.gameObject);
                 Debug.Log("Enemy down.");
             }
         }
     }
 
     /* ... No changes to Start, 
            Update, 
            InitializePatrolRoute, 
            MoveToNextPatrolLocation, 
            OnTriggerEnter...