low, and the bottom right is blue. You should see no red.</p>
    <svg>
        <defs>
            <pattern id="coloredBoxes" patternUnits="userSpaceOnUse" x="0" y="0" width="50" height="50">
                <rect x="25" y="25" width="25" height="25" fill="yellow"/>
                <rect x="0" y="25" width="25" height="25" fill="blue"/>
                <rect x="25" y="0" width="25" height="25" fill="green"/>
                <rect x="0" y="0" width="25" height="25" fill="fuchsia"/>
            </pattern>
   