private Rigidbody2D rigidBody;
private Renderer renders;

void Start()
{
    rigidBody = GetComponent<Rigidbody2D>();
    renders = GetComponent<Renderer>();

    if (isLooping)
    {
        for(int i = 0; i < transform.childCount; i++)
        {
            Transform child = transform.GetChild(i);

            if (child.renderer != null)
            {
                backgroundPart.Add(child);
            }
        }
    }
}