<!DOCTYPE html>
<html>
<body>
<canvas id ="output" width="300" height="400"></canvas>
<script>
var canvas = document.getElementById('output');
var ctx = canvas.getContext('2d');

ctx.beginPath();
ctx.lineWidth = '10';
ctx.strokeStyle = 'green';
ctx.moveTo(15, 15);
ctx.lineTo(135, 15);
ctx.lineTo(70, 170);
ctx.closePath();
ctx.stroke();

var path1 = new Path2D();
path1.moveTo(250, 25);
path1.bezierCurveTo(110, 150, 110, 300, 200, 200);
ctx.strokeStyle = 'purple';
ctx.setLineDash([ 10, 5 ]);
ctx.stroke(path1);

ctx.fillStyle = 'red';
ctx.beginPath()
ctx.arc(75, 325, 50, 0, Math.PI * 2, true);
ctx.arc(75, 325, 20, 0, Math.PI * 2, true);
ctx.fill('evenodd');
</script>
</body>
</html>