This is a good, basic how to visual on tying a tube fly. Start simple and keep the pattern lean to provide room for all the materials to move and provide the periodic glimpse of light=life. Translucense is a plus, as opposed to just silhouette. Give the silhouette and the light…because it equals life.
http://www.sexyloops.com/flytying/black_and_silver.shtml
SwittersB & Exploring 