h5s2.2.5

by lozenlin

HTML

<canvas id="can" width="400" height="300"></canvas>

JavaScript

var ctx = can.getContext("2d");
var width = can.width,
  height = can.height;
var xOff = width * 0.5 + 5,
  yOff = height * 0.5 + 5;

for (var i = 0; i < 8; i++) {
	ctx.beginPath();
  ctx.arc(xOff, yOff, i*15, 0, Math.PI*2, true);
  ctx.closePath();
  ctx.stroke();
}