Multiple object with same script

Hi all, new here and I have small problem that I cannot solve. I tried to read the forum and couldn't find solution that will help me. Anyway to the point:

I have a script attached to object. to move the object. All good. but when I add another object, they are moving together. I tried to debug and saw that line 34 was executed twice (2 object on the display) So I was thinking can it be because of the Raycast detection in same script?

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class moveBlock : MonoBehaviour
 {
 
     private RaycastHit hit;                 //Detect side of block that was presssed
     private Vector3 mousePos;               //Mouse position on the collision
     private string hitName ;                //Collider name
     private Vector2 origPos, targetPos;     //Initioate original and target positions
     private float timeToMove = 0.2f;        //Time that will take to move the block
     private bool isMoving;                  //Is the block moving
     // Update is called once per frame
     void Update()
     {
         mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
         if (Physics.Raycast(mousePos, Vector3.forward, out hit, 100.0f))
         {
             hitName = hit.collider.name;        //Write the name of the collider that was hit
         }
         else
         {
             hitName = "none";                   //If no collision accured, none. 
         }
 
         //set if velocity is not zero, isMoving = true;
 
         if (Input.GetMouseButtonDown(0) && !isMoving)
         {
             switch (hitName)
             {
                 case "r":
                     StartCoroutine(MoveBlock(Vector2.right / 2));
                     break;
                 case "l":
                     StartCoroutine(MoveBlock(Vector2.left / 2));
                     break;
                 case "u":
                     StartCoroutine(MoveBlock(Vector2.up / 2));
                     break;
                 case "d":
                     StartCoroutine(MoveBlock(Vector2.down / 2));
                     break;
                 default:
                     break;
             }
         }
 
     }
 
 
     private IEnumerator MoveBlock (Vector2 direction)
     {
         isMoving = true;
         float elapsedTime = 0;
 
         origPos = transform.position;
         targetPos = origPos + direction;
 
         while(elapsedTime<timeToMove)
         {
             transform.position = Vector2.Lerp(origPos, targetPos, (elapsedTime / timeToMove));
             elapsedTime += Time.deltaTime;
             yield return null;
         }
 
         transform.position = targetPos;
 
         isMoving = false;
     }
 
 }

Any idea where can I find good explanation or maybe someone have a explanation? Thanks in advance.