SVG pattern experiment
by clauswilke
HTML
<svg width="400" height="400">
<defs>
<pattern id="Pattern" x="0" y="0" width=".25" height=".25">
<circle cx="25" cy="25" r="20" fill-opacity="0.5"/>
<circle cx="45" cy="25" r="10" fill-opacity="0.5"/>
<circle cx="-5" cy="25" r="10" fill-opacity="0.5"/>
</pattern>
</defs>
<g fill="blue">
<rect fill="url(#Pattern)" stroke="black" x="100" y="100" width="200" height="200" transform="rotate(.25turn)"/>
</g>
</svg>