Random Numbers

RND stands for RANDOM, and stands for a different number between 0.0 and 0.99999 each time it is exectued. To get larger numbers, multiply RND by the largest number you need. For example, 640*RND gives you a number between 0 and 640*0.99999. In other words, it will give you a number between 0 and slightly less than 640. Each time 640*RND is executed, it is like picking a number out of a hat. You know the number will be between zero and slightly less than 640, But other than that you know nothing.