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timerControl 代码：

public class timerControl : MonoBehaviour {
    private bool isClose;

    // Use this for initialization
    void Start () {
        float value = Random.Range (0.1f, 1.0f);
        InvokeRepeating ("setupLight",1,value);
    }
    
    // Update is called once per frame
    void Update () {
        
    }

    void setupLight() {
        Light light = GetComponent<Light> ();
        light.enabled = isClose;
        isClose = !isClose;
    }
}

把这个脚本放到各个 Point Light 对象上~~~