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chromium/third_party/blink/web_tests/external/wpt/css/css-paint-api/paint2d-reset-ref.html 

<!DOCTYPE html>
<html>
<body>
<canvas id="output" width="100" height="100"></canvas>
<script>
var canvas = document.getElementById('output');
var ctx = canvas.getContext('2d');

ctx.fillStyle = 'yellow';
ctx.fillRect(10, 10, 50, 50);
ctx.fillStyle = 'magenta';
ctx.fillRect(20, 20, 50, 50);
ctx.strokeStyle = 'cyan';
ctx.moveTo(40, 0);
ctx.reset();
ctx.lineWidth = 10;
ctx.lineTo(0, 40);
ctx.stroke();
ctx.fillRect(30, 30, 20, 20);
</script>
</body>
</html>