Colour app, lesson 1 You may want to see these lessons before continuing. New folder, lesson 1 Wallpaper app, lesson 1 We will quickly show you how to: Access the Colour program from the Wallpaper program. Change the background colour of the desktop. Change the colour of a newly created folder. Web browser plugin requirements: Java, for the java applet used in this app. Goto http://java.com to download the plugin.