html:
    head:
        link(rel="stylesheet" type="text/css" href="treemap.css")
    body:
        form:
            label:
                input(type="radio", name="mode", value="size" checked)
                "Size"
            label:
                input(type="radio", name="mode", value="count")
                "Count"
        script(src="http://d3js.org/d3.v3.min.js")
        script(src="treemap.js")