how create a light ray-beam

or something called like that

while i'm busy with it, thought make a quick and easy tut how to create a light ray. i' just play with that pic with a blank mind

its really easy to create, and if you play a bit with it , you sure will find something that will be just the ray you need

its always appreciated if you show what you got if you did try this out

i'm gona enter this one into tutorial contest