在通过 Component 方法将 GameObject 添加到 GameObject 之后，如何从另一个脚本访问该 Component ？

下面是myScript代码(不附加到GameObject)：

using UnityEngine;
using System.Collections;
public class MyScript : MonoBehaviour {
    public string       myName = "myName";
    public Vector3      pos;
    public bool         visible;
}

下面是附加在场景中的游戏对象上的主要代码：

using UnityEngine;
using System.Collections;
public class Main : MonoBehaviour {
    public GameObject cube;
    void Update() {
        if(Input.GetKeyDown(KeyCode.Space)) {
            cube = GameObject.CreatePrimitive(PrimitiveType.Cube);
            cube.AddComponent<MyScript>();
        if(Input.GetKeyDown(KeyCode.LeftShift)) {
            var a = GameObject.Find("Cube");
            print("cube name/visible: " + 
            /* here is the problem, how do i access the MyScript variables? */ 
            a.myName + "/" + a.visible);
}