Create a root folder on your disk that will later become your bundle. For instance, let’s give this folder the name Resources.

Under the Resources folder, create three more folders named Images, Videos, and Sounds.

Under the three aforementioned folders, place related resources. For instance, place one or more images in the Images folder and one or more video files under the Videos folder and so on.

Once you are done, rename your Resources folder to Resources.bundle. Once you add this extension to your folder name, OS X will ask for your confirmation and a dialog similar to that shown in Figure 1-33 will appear on the screen. Press Add on the dialog to add the .bundle extension to the Resources folder.