unity2D 箭头动画

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class NewBehaviourScript : MonoBehaviour
{
    public int speed = 50;
    public float zoomspeed = 0.002f;
    public Vector2 v = new Vector2();

    public List<Vector2> theWayPoints = new List<Vector2>();
    public int index = 0;


    public Vector3 v_a = new Vector3();


    void Start()
    {
     
    
    // transform.Rotate(0, 0, 90f, Space.Self);

    Vector2 p = transform.position;
        p.x = 80;
        p.y = 430;
        transform.position = p;

        Vector2 pos = transform.position;
        pos.x = 350;
        pos.y = 170;
        theWayPoints.Add(pos);

        pos.x = 600;
        pos.y = 223;
        theWayPoints.Add(pos);

        pos.x = 800;
        pos.y = 500;
        theWayPoints.Add(pos);

        pos.x = 800;
        pos.y = 500;
        theWayPoints.Add(pos);
    }

    // Update is called once per frame
    void Update()
    {

        transform.position = Vector2.MoveTowards(transform.position, theWayPoints[index], speed * Time.deltaTime); //箭头指向

        

        v_a = Vector2.right;
        transform.localScale += v_a * zoomspeed * Time.deltaTime; //向右放大
        Debug.Log(Time.deltaTime.ToString());
        
        
        if (transform.position.Equals(theWayPoints[index])) //如果到了下一个点
        {
            index++;

            transform.localScale = Vector2.one;
           // ((RectTransform)transform).sizeDelta  = new Vector2(100, 100); ;



        }
        else //在一个点内的动作
        {
           
            Vector2 v = (theWayPoints[index] - (Vector2)transform.position).normalized * speed;//向右移动
            transform.right = v;
        }
    }
}