             App(name: "App 1", color: UIColor.greenColor()),
             App(name: "App 2", color: UIColor.blueColor()),
             App(name: "App 3", color: UIColor.redColor()),
+            Folder(name: "Folder 2", apps: []),
             Folder(name: "Folder 1", apps: [
                 App(name: "App 4", color: UIColor.purpleColor()),
                 App(name: "App 5", color: UIColor.grayColor()),
                 App(name: "App 6", color: UIColor.yellowColor()),
-            ]),
-            Folder(name: "Folder 2", apps: [])
+            ])
         ]
     }
 

    }
    
    override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 1;
    }
    
    override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {

        case let app as App:
            cell.backgroundColor = app.color
        case let folder as Folder:
            cell.backgroundColor = folder.apps[indexPath.row].color
        default:
            cell.backgroundColor = UIColor.whiteColor()
        }
