parallax

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


public class Parallax : MonoBehaviour {

	public Vector2 speed = new Vector2(1,1);
	public Vector2 direction = new Vector2(-1,0);

	public bool isLooping = false;
	private List <Transform> backgroundPart;


	// Use this for initialization
	void Start () {

		if(isLooping)
		{
			backgroundPart = new List<Transform>();

			for (int i = 0; i < transform.childCount; i++){

				Transform child = transform.GetChild(i);

				if (child.renderer != null)
			{
				backgroundPart.Add (child);
			}
		  }
		     backgroundPart = backgroundPart
			.OrderBy(t =>t.position.x).ToList();


		   }
         }

	// Update is called once per frame
	void Update () {

		Vector2 movement = new Vector2 (
	    speed.x * direction.x,
		speed.y * direction.y);
		movement*= Time.deltaTime;

		    transform.Translate (movement);

		    if (isLooping)
	        {
		    Transform firstChild = backgroundPart.FirstOrDefault();

			if (firstChild !=null)
		    {
			if(firstChild.position.x < Camera.main.transform.position.x)
			{
			if(!firstChild.renderer.IsVisibleFrom(Camera.main))
				{
			Transform lastChild = backgroundPart.LastOrDefault();

			Vector3 lastPosition = lastChild.position;

			Vector3 lastSize = (lastChild.renderer.bounds.max - lastChild
						                    .renderer.bounds.min);


					firstChild.position = new Vector3(
					lastPosition.x + lastSize.x,
					firstChild.position.y,
					firstChild.position.z);
					backgroundPart.Remove(firstChild);
					backgroundPart.Add(firstChild);
				}
			}
		}
	}
  }
}