How do simple moving platform?

just look at the code and differences, this code works I know, I already checked it.

If you need help understanding why it works compared to your code let me know.

 using UnityEngine;
 using System.Collections;
 
 public class Random : MonoBehaviour {
     
     public static float movespeed; //how quickly the platform moves
     public Vector3 Direction;      //direction of travel
     public float TravelDistance;    //how far to move before reverse
         Vector3 StartPos;
     public void Start(){
         movespeed = 2f;
         TravelDistance = 2f;
         Direction = Vector3.right;
         StartPos = transform.position;
     }
     
     public void Update(){
         if (transform.position.x > StartPos.x + TravelDistance)
             Direction = -Direction;
         
         if (transform.position.x < StartPos.x)
             Direction = Vector3.right;
         
         transform.Translate(Direction * movespeed * Time.deltaTime);
     }
 }

it does quite a few different. it uses vector3 not 2.

it doesn't have hardcoded values for when to turn around but just takes wherever the object starts and turns around a set distance from the start point. those are the main things. it also seperates declaring a variable and assigning it.