var b = document.getElementById("myCanvas");
var c = b.getContext("2d");

var step = 100;
var angle = 0.01;
var w = c.canvas.width;
var h = c.canvas.height;
var cmTID;

c.translate(w / 2, h / 2);
drawStep();
function drawStep() {
  c.clearRect(-w / 2, -h / 2, w, h);
  c.lineWidth = 3;
  c.strokeStyle = "#ffcd8a";
  c.strokeRect(-20, -20, 40, 40);
  c.fillStyle = "#ffcd8a";
  c.fillRect(10, 100, 50, 50);
  c.fillRect(-50, -70, 40, 40);
  c.fillRect(50, 30, 30, 30);
  c.rotate(angle);
  clearTimeout(cmTID);
  cmTID = setTimeout(drawStep, step);
}