.body {
    color: #000;
    background:url(https://www.cnblogs.com/images/cnblogs_com/Keenster/1344881/o_169wallhaven-599106.jpg) fixed;
    background-position:center;
    background-size:cover;
    background-repeat: no-repeat;
    font-family: "微软雅黑" , "PTSans" , "Arial" ,sans-serif;
    font-size: 14px;
    min-height: 101%;
}
<script type="text/javascript" charset="utf-8"  src="https://files.cnblogs.com/files/liuzhou1/L2Dwidget.0.min.js"></script>
<script type="text/javascript" charset="utf-8"  src="https://files.cnblogs.com/files/liuzhou1/L2Dwidget.min.js"></script>

<script type="text/javascript">
　　"model": { 　　　　jsonPath: "https://unpkg.com/live2d-widget-model-shizuku@1.0.5/assets/shizuku.model.json",//这是插件模型，可以任意选择想要添加的2d动画　　　　"scale": 1 　　},
    L2Dwidget.init({
      "display": {
        "superSample": 2,
        "width": 200,//宽度
        "height": 400,//高度
        "position": "right",//位置，right,left
        "hOffset": 0,
        "vOffset": 0
      }
   });
</script>