Rain Animation?

I’m making myself a banner with photoshop and flash 5, in the background I want it to be raining, but i’m not to sure how to do this, can anyone help?

The banner I want to use is uploaded

A good solution is to draw little lines in random places, either coded or simple flash drawing, in the first frame.

Then is the second put them in different position…

Do this for about 5 frames(if you draw with flash tools).

It will look really realistic.

good luck.