<!DOCTYPE HTML>
<html>
<body>
<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="400px" height="400px" >
<defs>
  <g id="patch">
    <rect x="0" y="0" width="10" height="40" fill="rgb(255,0,0)"/>
    <rect x="10" y="0" width="10" height="40" fill="rgb(0,255,0)"/>
    <rect x="20" y="0" width="10" height="40" fill="rgb(0,0,255)"/>
    <rect x="30" y="0" width="10" height="40" fill="rgb(127, 127, 0)"/>
  </g>
  <rect x="0" y="0" width="10" height="10" fill="rgb(255,0,0)"/>
</defs>
<g transform="scale(4 4)">
  <use xlink:href="#patch" x="0" y="0" width="40" height="10"></use>
  <use xlink:href="#patch" x="0" y="0" width="40" height="10" transform="rotate(90 20 20)" style="mix-blend-mode: color-dodge"></use>
</g>
</svg>
</body>
</html>