http://cg.tutsplus.com/tutorials/maxon-cinema-4d/create-a-futuristic-animated-computer-screen-shader-in-the-unreal-3-editor/

This tutorial offers an introduction to Unreal’s material editor and assumes no prior knowledge of the tool, or the presence of any other tools but the editor itself. Through the creation of a ‘flickering monitor’ material (or “shader”), this tutorial will demonstrate some of the powerful things that are capable with the material editor.