Realize ray detection, drag the mouse to move the object and use the pulley to scale the object



public class Script : MonoBehaviour {
    public GameObject obj;
    public float s;
 void Update () {

        Ray ray = new Ray();
        RaycastHit hit;
     
        ray = Camera.main.ScreenPointToRay(Input.mousePosition);
      
       
        if (Input.GetMouseButton(0))
        {      
            if (Physics.Raycast(ray,out hit,100))
            {
                obj.transform.position = new Vector3(hit.point.x,hit.point.y,0);
            }
        }
        if (Input.GetAxis("Mouse ScrollWheel") < 0)
        {
            s += Input.GetAxis("Mouse ScrollWheel");
            obj.transform.localScale = new Vector3(s, s, s);
        }             
       if (Input.GetAxis("Mouse ScrollWheel") > 0)
        {
            s += Input.GetAxis("Mouse ScrollWheel");
            obj.transform.localScale = new Vector3(s, s, s);
        }

}
}