<style>
#rec1 {
  transform: scale(.6,.6);
}
#rec2 {
  transform: translate(40px,40px) scale(.2,.2);
}
</style>
<svg width="200" height="200">
  <defs>
    <pattern id="Pattern" x="0" y="0" width=".25" height=".25">
      <rect id="rec1" x="0" y="0" width="50" height="50" fill="skyblue"/>
      <g>
        <rect id="rec2" x="0" y="0" width="50" height="50" fill="skyblue"/>
      </g>
    </pattern>
  </defs>

  <rect fill="url(#Pattern)" stroke="black" width="200" height="200"/>
</svg>