点击按钮改变颜色 模型动画暂停继续功能

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using DG.Tweening;

public class Layer2 : MonoBehaviour
{
public static Layer2 instance;
#region 按钮
[Header(“返回一级界面”)]
public Button back_btn;
[Header(“展开列表”)]
public Button list_btn;
[Header(“关闭列表”)]
public Button close_list_btn;

[Header("播放模型动画")]
public Button model_play_btn;
[Header("暂停模型动画")]
public Button model_stop_btn;

[Header("播放、暂停模型动画按钮父物体")]
public GameObject model_obj_btn;


[Header("主键按钮")]
public List MKey_btn;
[Header("副键按钮")]
public List AKey_btn;
[Header("副键数目按钮")]
public List listbtn_text;
[Header("主键数目按钮")]
public List listmainbtn_text;
#endregion
#region 物体
[Header("局部按钮")]
public GameObject btns_obj;
[Header("主键数量")]
public Game