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<!DOCTYPE html>
<html>
<body>
<canvas id="c" width="50" height="50"></canvas>
<script>
const c = document.getElementById("c");
const ctx = c.getContext("2d");
ctx.beginPath();
ctx.moveTo(20, 20);
ctx.lineTo(30, 20);
ctx.stroke();
</script>
</body>
<html>