Unity 2D touch drag on Android

Hello, I'm a begginer in Unity. I want to drag object in all places. Actually i have similarity program. But this program is not what I want, The program is i touch screen everywhere the object will be drag. My ideal is when i touch the object then drag. Thank you.

 using UnityEngine;
 using System.Collections;
 
 public class NewPe : MonoBehaviour
 
 {
 float distance = 10;
     void Start()
     {
 
     }
     void Update()
     {
         if (Input.touchCount > 0 && Input.touches[0].phase == TouchPhase.Moved)
         {
 
             Vector3 mousePosition = new Vector3(Input.mousePosition.x, Input.mousePosition.y, distance);
             Vector3 objPositon = Camera.main.ScreenToWorldPoint(mousePosition);
             transform.position = objPositon;
 
         }
 
     }
 }