<?xml version="1.0"?>

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
  <rect x="0" y="0" width="100" height="100" stroke="blue" stroke-width="1" fill="none"/>
  <g stroke="black" stroke-width="3">
    <rect x="10" y="10" width="50" height="50" fill="yellow"/>
    <rect x="40" y="40" width="50" height="50" fill="lime"/>
  </g>
</svg>

