SVG - polyline

<?xml version="1.0" ?>
<svg
  xmlns   = "http://www.w3.org/2000/svg"
  version = "1.1"
  width   = "500"
  height  = "500"
>
  <polyline
    points =" 10, 10
             490, 10
              10,490
             490,490"

    stroke       = "green"
    stroke-width = "8"
    fill         = "none"
  />
</svg>