A CodePen by magudb. Backbone code

script.js

require.config({
  paths:{
    'jquery':'http://cdnjs.cloudflare.com/ajax/libs/jquery/2.0.3/jquery.min',
    'underscore':'http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.5.1/underscore-min', 
    'backbone':'http://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.0.0/backbone-min',    
    'marionette' : 'http://cdnjs.cloudflare.com/ajax/libs/backbone.marionette/1.0.4-bundled/backbone.marionette.min'
  },
  shim:{
	  'underscore':{
	  	exports:'_'
	  },
	  'backbone':{
	  	deps:['underscore','jquery'],
	  	exports:'Backbone'
	  },
	  'marionette' : {
	      deps : ['jquery', 'underscore', 'backbone'],
	      exports : 'Marionette'
    }
}
});

define(function (require) {
	'use strict';
   console.log('showing something');
	var Marionette = require('marionette');
	var Backbone = require('Backbone');
	var _ = require('underscore');
	var $ = require('jquery');

	var App = new Marionette.Application();
	App.addRegions({
    	"gallery": "#galleryContainer" ,
    	"mostPopular":"#mostPopularContainer",
    	"flexslider","#flexslider"
	});
    App.module("gallery",function(Mod, App, Backbone, Marionette, $, _){
    	var galleryModel = Backbone.Model.extend({});
    	var galleryCollection = Backbone.Collection.extend({model: galleryModel});
    	var GalleryItemView = Marionette.ItemView({
    		template:'#galleryTemplate'
	  	});
		var Gallery = Marionette.CollectionView.extend({
		  	itemView: GalleryItemView
		});

		var GalleryController = Marionette.Controller.Extend({
			initialize: function(options){
            	this.region = options.region
        	},
        
        	show: function(){ 
            console.log('showing something');
        		var collection = new galleryCollection(window.galleryJson);          	
               	var view = new Gallery({
               		collection: collection;
               	});
            
            	this.region.show(view);
        	}
		});
		  Mod.addInitializer(function(){
	        Mod.galleryController = new GalleryController({
	            region: App.gallery
	        });
        	Mod.galleryController.show();
    	});
    }); 
  console.log(App);
  return App.start();
});