<!DOCTYPE html>
<html lang="en-US">
<body>
<svg width="100%" height="600">
<pattern id="patt" x="0" y="0" width="150" height="150" patternUnits="userSpaceOnUse" >
<rect x="0" width="75" height="75" y="0"/>
<rect x="75" width="75" height="75" y="75"/>
</pattern>
<rect x="0" y="0" width="100%" height="100%" fill="url(#patt)" />
</svg>
</body>
</html>