goog.provide('movingballs');
  
  goog.require('lime.Director');
  goog.require('lime.Scene');
  goog.require('lime.Circle');
  goog.require('lime.animation.Spawn');
  goog.require('lime.animation.FadeTo');
  goog.require('lime.animation.ScaleTo');
  goog.require('lime.animation.MoveTo');
  
  movingballs.start = function(){
  
    var director = new lime.Director(document.body,1024,768),
        scene = new lime.Scene();
  
    director.makeMobileWebAppCapable();
  
    goog.events.listen(scene,['mousedown','touchstart'],function(e){
  
      var circle = new lime.Circle()
                           .setSize(50,50)
                           .setFill(Math.floor(Math.random()*255),
                                    Math.floor(Math.random()*255),
                                    Math.floor(Math.random()*255));
      scene.appendChild(circle);
      circle.setPosition(e.position.x,e.position.y)
            .setOpacity(0.5);
                
  
      e.swallow(['mousemove','touchmove'],function(e) {
        circle.runAction(
          new lime.animation.MoveTo(e.position)
                            .setEasing(lime.animation.Easing.LINEAR)
  
        );
      });
  
      e.swallow(['mouseup','touchend'],function(e){
        circle.runAction(new lime.animation.Spawn(
          new lime.animation.FadeTo(1),
          new lime.animation.ScaleTo(1.5)
          ));
        });
      });
  
      director.replaceScene(scene);
    };