<html>
<body>
<script>
var canvas = document.createElement('canvas');
canvas.setAttribute('width', '50');
canvas.setAttribute('height', '30');
var ctx = canvas.getContext('2d');
document.body.appendChild(canvas);
ctx.fillStyle = 'rgb(0, 255, 0)';
ctx.fillRect(0, 0, 10, 10);
ctx.fillRect(11, 0, 10, 10);
ctx.fillRect(22, 0, 10, 10);
ctx.fillRect(33, 0, 10, 10);
ctx.fillRect(0, 11, 10, 10);
ctx.fillRect(11, 11, 10, 10);
ctx.fillRect(22, 11, 10, 10);
ctx.fillRect(33, 11, 10, 10);
</script>
<p>There should be 8 green squares displayed in a 2 row by 4 column grid.</p>
</body>
</html>
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