I don't know if it's a script, but.....

It may also be a stupid question, but anyway:

How do you get the fog to move itself? I've seen it in a couple of game in the forum.

It's not a script. You set it when you set up the fog, like so:



See those SX, SY thingies?

You can think of that as X speed and Y speed. The higher the number, the faster it moves. As well, the sign determines direction. The directions work like this:

North: + Y value
East: + X value
South: - Y value
West: - X value

And the magnitude determines speed. So -5 is as fast as +5, but in the opposite direction.

I hope that helps. Post back if you still have questions.