private void Start()
{
TileList.Init();
TileHolder.Init();
Rect camR = Utils.CameraRect();
Rect listR = TileList.CalculateWorldRect();
BoxCollider2D colldier = GetComponent <BoxCollider2D>();
float width = TileHolder.Width;
float height = camR.height - TileHolder.Height;
transform.position = new Vector3(listR.xMax + width / 2, listR.yMax - height / 2);
colldier.size = new Vector2(width, height);
}