Multitouch drag object

Hi, this is my script that allows to touch an object 2d and drag it in the screen, i want to ability multitouch because i need to touch 2 objects 2d simultaneously and drag in the screen. Please i need your help, can you help me?

Sorry for my bad english

 using UnityEngine;
 using System.Collections;
  
 public class Drag : MonoBehaviour {
  
     //This code is for 2D click/drag gameobject
  
     public GameObject gameObjectTodrag; //refer to GO that being dragged
  
     public Vector3 GOcenter; //gameobjectcenter
     public Vector3 touchPosition; //touch or click position
     public Vector3 offset;//vector between touchpoint/mouseclick to object center
     public Vector3 newGOCenter; //new center of gameObject
  
     RaycastHit hit; //store hit object information
  
     public bool draggingMode = false;
  
  
     // Use this for initialization
     void Start()
     {
  
     }
  
     // Update is called once per frame
     void Update()
     {
  
         //***********************
         // *** CLICK TO DRAG ****
         //***********************
  
 #if UNITY_EDITOR
         //first frame when user click left mouse
         if (Input.GetMouseButtonDown(0))
         {
             //convert mouse click position to a ray
             Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
  
             //if ray hit a Collider ( not 2DCollider)
             if (Physics.Raycast(ray, out hit))
             {
                 gameObjectTodrag = hit.collider.gameObject;
                 GOcenter = gameObjectTodrag.transform.position;
                 touchPosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
                 offset = touchPosition - GOcenter;
                 draggingMode = true;
             }
         }
  
         //every frame when user hold on left mouse
         if (Input.GetMouseButton(0))
         {
             if (draggingMode)
             {
                 touchPosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
                 newGOCenter = touchPosition - offset;
                 gameObjectTodrag.transform.position = new Vector3(newGOCenter.x, newGOCenter.y, GOcenter.z);
             }
         }
  
         //when mouse is released
         if (Input.GetMouseButtonUp(0))
         {
             draggingMode = false;
         }
 #endif
  
         //***********************
         // *** TOUCH TO DRAG ****
         //***********************
         foreach (Touch touch in Input.touches)
         {
             switch (touch.phase)
             {
                 //When just touch
                 case TouchPhase.Began:
                     //convert mouse click position to a ray
                     Ray ray = Camera.main.ScreenPointToRay(touch.position);
  
                     //if ray hit a Collider
                     // if (Physics.Raycast(ray, out hit))
                     if (Physics.SphereCast(ray, 0.3f, out hit))
                     {
                         gameObjectTodrag = hit.collider.gameObject;
                         GOcenter = gameObjectTodrag.transform.position;
                         touchPosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
                         offset = touchPosition - GOcenter;
                         draggingMode = true;
                     }
                     break;
  
                 case TouchPhase.Moved:
                     if (draggingMode)
                     {
                         touchPosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
                         newGOCenter = touchPosition - offset;
                         gameObjectTodrag.transform.position = new Vector3(newGOCenter.x, newGOCenter.y, GOcenter.z);
                     }
                     break;
  
                 case TouchPhase.Ended:
                     draggingMode = false;
                     break;
             }
         }
     }
 }