Scrolling 2D Background in Unity

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class BackgroundScroll : MonoBehaviour
{
    private Material quadMaterial;
    private Vector2 offset;

    [SerializeField] private int xVelocity;
    [SerializeField] private int yVelocity;
    // Start is called before the first frame update
    void Start()
    {
        quadMaterial = GetComponent<Renderer>().material;
        offset = new Vector2(xVelocity, yVelocity);
    }

    // Update is called once per frame
    void Update()
    {
        quadMaterial.mainTextureOffset += offset * Time.deltaTime;
    }
}