<!DOCTYPE html>
<html>
<body>
<canvas id="myCanvas" width="300" height="150" style="border:1px solid #d3d3d3;">
Your browser does not support the HTML5 canvas tag.</canvas>
<script>
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.beginPath();
ctx.moveTo(20, 20); // Create a starting point
ctx.lineTo(100, 20); // Create a horizontal line
ctx.arcTo(150, 20, 150, 70, 50); // Create an arc
ctx.lineTo(150, 120); // Continue with vertical line
ctx.stroke(); // Draw it
</script>
</body>
</html>