Making a moving object change direction when it reaches a certain position?

I've never written on a forum before so let me know if I'm posting to the wrong forum or doing something wrong.
I'm trying to make a game where the clouds move from side to side in the background, and I want the clouds to start moving the opposite direction when they reach a certain position off-camera.

Please let me know what improvements I can make, I'm new to all this haha.

Edit: I uploaded the code properly this time, thanks for the advice!

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class CloudMovement_Right : MonoBehaviour
6. {
7. private Rigidbody rb;
8.  
9.     // Start is called before the first frame update
10.     void Start()
11.     {
12.         rb = GetComponent<Rigidbody>();
13.     }
14.  
15.     public float speed = 2.0f;
16.     private Vector3 endPosition = new Vector3(90, -2, 77);
17.     private Vector3 startPosition = new Vector3(-90, -2, 77);
18.  
19.     // Update is called once per frame
20.     void Update()
21.     {
22.         if(transform.position == startPosition)
23.         {
24.             transform.Translate(Vector3.forward * Time.deltaTime * speed);
25.         }
26.         else if(transform.position == endPosition)
27.         {
28.             transform.Translate(Vector3.back * Time.deltaTime * speed);
29.         }
30.         else
31.         {
32.             transform.Translate(Vector3.forward * Time.deltaTime * speed);
33.         }
34.        
35.     }
36. }
37.  

 

I should probably mention, the y and z coordinates are correct to the specific cloud I am trying to apply this to, and the only changing coordinate will be my x-coordinate as it moves from side-to-side.

 

Please edit your post to make the code more readable. In the edit bar there is a word "Code:". Click the first icon to the right of it and post your code there rather than post it as it is. While i'm not going to be able to help you, others might be more inclined to help if the code is formatted properly.

 

Thank you for letting me know! I updated it.

 

Yeah I can see there's a pretty significant difference haha, it's updated now.