Data Flow Effect (Like Snow)

I wish to create a data flow effect as a background to a preloader, the only problem is I can’t get the effect correct.

I wish to make it look like the Kirupa Snow Effect except it snows horizontally to the right.

------------------------> This way

I also would like the data to flow straight not sway like the snow, and each movie clip needs to be a random colour out of those on the attached image.

The data should be randomly sized, and placed like the snow. If anybody is able to help me and provide it as a source file it would be greatly appreciated.

Thanks in advance!