The higher the number, the longer the script will take to reach it and the longer the script will run moving the Layer across the screen. One more thing. The problem was that I has it so that only one was added each time. That means x was 99 and then 101. It never did get to equal 100.
Higher numbers scroll slower.
Finally the curly bracket rounds out the function and the script comes to an end. This is becoming a popular effect. In fact, this is being asked for more often than just the simple moving layer. I'm using the same script as above with just a few simple changes. I also added a link See it in Action OK, that's pretty smooth, you have to admit.