keijiroさんのサンプルのRing部分のC#化 transformは最適化した

Ring.cs

using UnityEngine;
using System.Collections;

public class Ring : MonoBehaviour
{
    private Transform _myTransform ;

    void Awake ()
    {
        _myTransform = transform;
    }

    // Use this for initialization
    void Start ()
    {
        _myTransform.rotation = Random.rotation;
    }
 
    // Update is called once per frame
    void Update ()
    {
        _myTransform.localRotation *= Quaternion.AngleAxis (Time.deltaTime * 180.0f, Vector3.right);
    }
}