Noughts and Crosses Installation Copy all the files (listed below) into the directory c:\system\apps\noughts\. If you can't view the system folder, edit the Preferences in the system screen tools menu. Board Icon OXIcon O X Noughts.app Noughts.aif Controls The aim is to get three of a type (Noughts or crosses) in a row. Tap the space on the screen where you want to place your piece with the pen \ stylus. Do not drag the pen across multiple places, or an error may occur.