Thanks for the response...

Anyway havn't had the time to check out the whole EFG yet, and I really don't know if I can use the Marching Ants...

Anyway the function I want to create is something that is similiar to the function that is in "Pipe Mania" when the pipes get filled with water!...

Pipe Mania, is a new edition of the good old "Pipe Dreams", anyway go to The Underdogs
and grab your self a copy to see what I'm talking about. Btw the above link to a game called EmPipe, and it's freeware, maybe there are other clones of the Pipe games on The Underdogs.

I hope that you know what function / effect that I'm talking about now.