How do you make slowly rolling in Fog Script? thanks :0

I guess you mean you want to change the Fogend.

Everything is explained in the script:

for i = 0, 500, 1 do --set the first number to what the fog will originally be at, set the second one to what value it will be at the end, and the third number is what number it will count up by
	game.Lighting.FogEnd = i --do not change this line of code
	wait(0.01) --set that number to how many seconds you want it to wait.
end

Here is how for loops work:

http://wiki.roblox.com/index.php?title=Loops&redirect=no#For

If this helped, please accept the answer. Thanks!