text: window.onload = function() {
  	var canvas = document.getElementById("canvas"),
  		context = canvas.getContext("2d"),
  		width = canvas.width = window.innerWidth,
  		height = canvas.height = window.innerHeight;
  
  	var angle = Math.PI / 4;
  	
  	context.translate(width / 2, height / 2);
  	context.rotate(angle);
  
  	context.beginPath();
  	context.arc(0, 0, 20, 0, Math.PI * 2, 0);
  	context.fill();
  
  	context.lineWidth = 10;
  	context.beginPath();
  	context.moveTo(0, 0);
  	context.lineTo(50, 0);
  	context.stroke();
  };