A dark colored SVG Horizontal Bar chart

A Horizontal Bar chart with an offset X axis. The chart has a dark color scheme and uses the wave() effect. The dark background is achieved by setting the background color of the DIV tag (using CSS).

This goes in the documents header:
<script src="RGraph.svg.common.core.js"></script>
<script src="RGraph.svg.hbar.js"></script>
Put this where you want the chart to show up:
<div style="width: 750px; height: 500px; display: inline-block; background-color: #000" id="chart-container"></div>
This is the code that generates the chart:
    new RGraph.SVG.HBar({
        id: 'chart-container',
        data: [[20, 40],[18,80],[9,42],[40,58],[74,20],[20,73], [26,56]],
        options: {
            backgroundGrid: false,
            xaxisColor: '#999',
            xaxisTextColor: '#ccc',
            yaxisTextColor: '#ccc',
            yaxisColor: '#999',
            yaxisLabels: ['Category 1','Category 2','Category 3','Category 4','Category 5','Category 6','Category 7'],
            colorsStroke: 'white',
            vmargin: 15,
            xaxisScaleMin: -20,
            xaxisScaleMax: 80,
            colors: ['#FFC500','#1E98E4'],
            xaxisScaleUnitsPost: 'pc'