After downloading, extract the zip file and open it. Then, drag the folder to Documents/Arduino. If you do not have Arduino or the DigiKeyboard installed, here is a guide on how to get everything set up so you can start making Bad USBs.
Rickroll
Metasploit Backdoor
My Little Pony Theme
Anime Theme
Mouse Jiggler
File Viewer
Desktop Wallpaper Changer