Unity 2D Infinite Background Scrolling Simplest Way

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Code for Infinite Background Scrolling IN Unity 2d game.

using UnityEngine;
using System.Collections;
 
public class Scroll : MonoBehaviour
{
 
    public float backGroundSize;
 
    private Transform cameraTransform;
    public Transform[] layers;
 
    private float viewZone = 0;
    private int leftIndex;
    private int rightIndex;
 
    private void Start()
    {
        cameraTransform = Camera.main.transform;   
 
        leftIndex = 0;
        rightIndex = layers.Length - 1;
    }
 
    void Update()
    {
        if (cameraTransform.position.x < 
            (layers[leftIndex].transform.position.x + viewZone))
            ScrollLeft();
 
        if (cameraTransform.position.x > 
            (layers[rightIndex].transform.position.x - viewZone))
            ScrollRight();
    }
 
    private void ScrollLeft()
    {    
        layers[rightIndex].position = new 
           Vector3
           (1f * (layers[leftIndex].position.x - backGroundSize), 0f, 0f);
        leftIndex = rightIndex;
        rightIndex--;
        if (rightIndex < 0)
            rightIndex = layers.Length - 1;
    }
    private void ScrollRight()
    {   
        layers[leftIndex].position = 
            new Vector3
            (1f * (layers[leftIndex].position.x + backGroundSize), 0f, 10f);
        rightIndex = leftIndex;
        leftIndex++;
        if (leftIndex == layers.Length)
            leftIndex = 0;
    }
}