old_contents: var game = new Phaser.Game(800, 600, Phaser.CANVAS, 'phaser-example', 
  	{ create: create, render: render });
  
  var circle = [];
  var floor;
  var offsetX = 70; // roughly the diameter
  var offsetY = 70;
  
  function create() {
  	for (var i = 0; i != 25; ++i) {
  		for (var j = 0; j != 10; ++j) {
  			circle = new Phaser.Circle(/*game.world.centerX*/i * offsetX, j * offsetY, 64)
  		}
  
  	}
  }
  
  function render() {
  	for (var i = 0; i != 250; ++i) {
  		game.debug.geom(circle[i], '#cfffff');
  	}
  	// game.debug.text('Diameter: ' + circle.diameter, 50, 200);
  	// game.debug.text('Circumference : ' + circle.circumference(), 50, 250);
  }
new_contents: var game = new Phaser.Game(800, 600, Phaser.CANVAS, 'phaser-example', 
  	{ preload: preload, create: create, update: update, render: render });
  
  function preload() {
  }
  
  function create() {
  }
  
  function update() {
  }
  
  function render() {
  }
  
subject: Prepare for sprites