<?xml version="1.0"?>
<svg xmlns="http://www.w3.org/2000/svg" width="512">
<title>The black square should be 256 pixels wide.</title>
<defs>
<pattern id="pattern" width="8192" height="8192" patternUnits="userSpaceOnUse">
<rect x="0" y="0" width="256" height="8192" fill="black" style="stroke:none" />
</pattern>
</defs>
<rect width="512" height="100" x="0" y="0" fill="url(#pattern)" />
</svg>