I need to find a way to pan my camera around an object.

I have a map which the camera moves around but need to be able to pan around the map, holding down the right mouse button. I have tried so many online solutions already but none of them seem to work. Could anyone help please?
This is the code I have at the moment for moving the camera…
using UnityEngine;

using System.Collections;

public class CameraDrag3: MonoBehaviour {

float speed = 20.0f;

void Update () {

	if (Input.GetMouseButton (0)) {

		// Start with our current location
		Vector3 newPosition = transform.position;

		// Increment based on the mouse motion
		newPosition += transform.right * Input.GetAxisRaw ("Mouse X") * Time.deltaTime * speed;
		newPosition += transform.up * Input.GetAxisRaw ("Mouse Y") * Time.deltaTime * speed;

		// Reassign the vector
		transform.position = newPosition;

	//if (Input.GetMouseButton (1)) {


Like I said I have tried so many solutions already but cannot get any to work, could someone please help?

Here’s the script I use to pan around my map:

if (Input.GetMouseButton(0))
            float mX, mY;
            mX = -Input.GetAxis("Mouse X");
            mY = -Input.GetAxis("Mouse Y");
            gameObject.transform.Translate(Vector3.forward * mY * 3);
            gameObject.transform.Translate(Vector3.right * mX * 3);