繞圈圈

========================================================================

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour 
{

Vector3[] T = new Vector3[4];
// Use this for initialization
void Start()
{
T[0] = new Vector3(4f, -6.161964e-17f, 3f);
T[1] = new Vector3(-4f, -6.161964e-17f, 3f);
T[2] = new Vector3(-4f, -6.161964e-17f, -4f);
T[3] = new Vector3(4f, -6.161964e-17f, -4f);

}
int aa = 0;

// Update is called once per frame
void Update()
{
transform.position = Vector3.MoveTowards(transform.position, T[aa], 10 * Time.deltaTime);
if (transform.position == T[aa])
aa = (aa + 1) % 4;


}
}