for (int j = 0; j < 8; j++){for (int i = 0; i < 8; i++){for (int k = 0; k < 8; k++){Instantiate(gameObject, new Vector3(j * 2, i * 2, k * 2), Quaternion.identity);}}}
http://blog.sina.com.cn/s/blog_a16ece210101bwyx.html