问在一组游戏对象中循环，点击c#杀死前一个对象

EN

public Transform[] Cubes;
Transform Clone;
public Transform Spawnup;

void Start()
{
Clone = Instantiate(Cubes[Random.Range(0, 3)], transform.position, 
transform.rotation) as Transform;
Clone.parent = transform;

transform.position = Spawnup.position;


}

void FixedUpdate()
{
if (transform.childCount < 1)
{
transform.position = Spawnup.position;

Clone = Instantiate(Cubes[Random.Range(0, 3)], transform.position, 
transform.rotation) as Transform;
Clone.parent = transform;
}
}


private public void ChangeOnClick()
{
//Destroy(gameObject);

//for (int i = 0; i < Cubes.Length; i++)
// {
//    Clone = Instantiate(Cubes[0], Clone.position, Clone.rotation) as 
Transform;
// }

}

private void OnTriggerEnter2D(Collider2D collision)
{
if (collision && transform.childCount > 0)

{
Clone.parent = Spawnup;
}
}
}