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<html>
<body>
<canvas width="500" height="500"></canvas>
<script>
var canvas = document.getElementsByTagName('canvas')[0];
var ctx = canvas.getContext('2d');
ctx.scale(0.5, 0.5);
ctx.translate(41, 41.);
ctx.rect(0, 0, 100, 100);
ctx.moveTo(100,0);
ctx.quadraticCurveTo(200, 100, 300,0);
ctx.moveTo(300,0);
ctx.bezierCurveTo(400, 100, 500, -100, 600,0);
ctx.stroke();
</script>
</body>
</html>
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