<svg width="5cm" height="5cm" version="1.1">      <desc>Two groups, each of two rectangles </desc>      <g id="group1" fill="red">           <rect x="1cm" y="1cm" width="1cm" height="1cm"/>           <rect x="3cm" y="1cm" width="1cm" height="1cm"/>      </g>      <g id="group2" fill="blue">           <rect x="1cm" y="3cm" width="1cm" height="1cm"/>           <rect x="3cm" y="3cm" width="1cm" height="1cm"/>      </g>      <rect x=".01cm" y=".01cm" width="4.98cm" height="4.98cm" fill="none" stroke="blue" stroke-width=".02cm"/> </svg>

Original SVG source