ody, #main {
                width: 100%;
                height: 100%;
                background-image: url(old_mathematics.png);
                background-repeat: repeat;
            }
        </style>
        <div id="main"></div>
        <script>

            require([
                'echarts'
            ], function (echarts) {

                var mainEl = document.getElementById('main');
                var chart = echarts.init(mainEl);
                var colorList = [
                    '#c2353