try creating a stream of it in photoshop, and animate it in after effects. simpla as that. Can't tell you how real it would look though. Although, with some filters, you should be able to get it to look somewhat decent.
U make one with a blue blackground, then right click on it (make sure its on track 2) and select transparency. Then select blue screen, and mess with the sliders till you get the desired effect. Then right click on it and select motion. Dont forget to choose the fill colour as the blue bit otherwise it looks bollocks
thanks!
