Question how to move npc back and forth between boxes

I am trying to move my npc between boxes rather then going through it.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class Patrol : MonoBehaviour
6. {
7.  
8.     public float speed;
9.     public float distance;
10.     private bool movingRight = true;
11.     public Transform groundDetection;
12.  
13.     void Update()
14.     {
15.  
16.         transform.Translate(Vector2.left * speed * Time.deltaTime);
17.  
18.         RaycastHit2D groundInfo = Physics2D.Raycast(groundDetection.position, Vector2.down, 2.0f, LayerMask.GetMask("Ground"));
19.  
20.         if (groundInfo.collider == false)
21.         {
22.             if (movingRight == true)
23.             {
24.                 transform.eulerAngles = new Vector3(0, -180, 0);
25.                 movingRight = false;
26.             }
27.             else
28.             {
29.                 transform.eulerAngles = new Vector3(0, 0, 0);
30.                 movingRight = true;
31.             }
32.         }
33.  
34.     }
35.    
36.  
37. }

 

Try one of these videos: