 .chart {
                height: 100%;
            }
            #pens {
                position: fixed;
                right: 10px;
                top: 10px;
                z-index: 9999999;
                border: 2px solid #aaa;
                text-align: center;
            }
            #pens div {
                width: 40px;
                height: 20px;
                cursor: pointer;
            }
        </style>

        <div id="pens">
            <span>free</span>
        </div>

       