enemy code unity

/*if you want the code to work you need to do this steps 
step 1 : you need to have on your enemy a collider.
step 2 : you will need to add the target (what the enemy goind to follow);
step 3 : you will need to add how match health he will have and how fast he will be;
step 4 : add how match damage he will do(if u want to have something that can die you will need to add to it a code the code can be found in this link https://youtu.be/BLfNP4Sc_iA)
step 5 : refrens what you want the enemy to do damage to
and the last thing is to add a death effect(if you want) happy to help!
*/
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Enemy : MonoBehaviour
{
 Rigidbody rig;
 public GameObject DealDamageTo;
 public Transform target;
 public GameObject deathEffect;
 
 public int health = 100;
 public float speed = 100f;
 public int damage = 30;

 

void Start ()
{
    rig = GetComponent<Rigidbody>();
}
 void FixedUpdate()
 {
     Vector3 pos=Vector3.MoveTowards(transform.position,target.position, speed * Time.fixedDeltaTime);
     rig.MovePosition(pos);
     transform.LookAt(target);
 }
 public void TakeDamage (int damage)
 {
     health -= damage;

     if (health <= 0)
     {
         Die();
     }
 }

 void Die ()
 {
     Instantiate(deathEffect, transform.position, Quaternion.identity);
     Destroy(gameObject);
 }

 
 void OnTriggerEnter (Collider hitInfo)
    {
        
        CanDie DealDamageTo = hitInfo.GetComponent<CanDie>();
        if (DealDamageTo != null ) 
        {
            DealDamageTo.TakeDamage(damage);
        }
        

    }

}