How to install library Moonlander Manual Install (currently the only way) Contributed libraries may be downloaded separately and manually placed within the "libraries" folder of your Processing sketchbook. To find (and change) the Processing sketchbook location on your computer, open the Preferences window from the Processing application (PDE) and look for the "Sketchbook location" item at the top. Copy the contributed library's folder into the "libraries" folder at this location. You will need to create the "libraries" folder if this is your first contributed library. By default the following locations are used for your sketchbook folder: For Mac users, the sketchbook folder is located inside ~/Documents/Processing. For Windows users, the sketchbook folder is located inside 'My Documents'/Processing. The folder structure for library Moonlander should be as follows: Processing libraries Moonlander examples library Moonlander.jar reference src Some folders like "examples" or "src" might be missing. After library Moonlander has been successfully installed, restart the Processing application. If you're having trouble, have a look at the Processing Wiki for more information: http://wiki.processing.org/w/How_to_Install_a_Contributed_Library