<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG April 1999//EN" 
  "http://www.w3.org/Graphics/SVG/svg-19990412.dtd">
<svg width="4in" height="3in">
  <desc>Four separate rectangles
  </desc>
    <rect width="20" height="60"/>
    <rect width="30" height="70"/>
    <rect width="40" height="80"/>
    <rect width="50" height="90"/>
</svg>