Out of Range Exception

So I'm doing a patrol walk from point to point enemy but when it walks to the first point it stops and I get a script array out of range error and he won't move and a line of text goes yellow.

 using UnityEngine;
 using System.Collections;
 
 public class Patrol : MonoBehaviour {
     public Transform[] patrolPoints;
     public float moveSpeed;
     private int currentPoint;
 
 
     // Use this for initialization
     void Start () {
         transform.position = patrolPoints[0].position;
         currentPoint = 0;
     }
     
     // Update is called once per frame
     void Update () {
         if (transform.position == patrolPoints[currentPoint].position)
         {
             currentPoint++;
         }
 
         transform.position = Vector3.MoveTowards(transform.localPosition, patrolPoints[currentPoint].position, moveSpeed * Time.deltaTime);
     }
 }