Click the green flag, select a number and type it in(the more randomized, the better), and watch as rainbow lines fill the screen.
I used the simple 3n+1 format for this project. (For those of you who don't know how 3n+1 works, if an odd number is selected, the system multiplies it by 3, then adds one to it. If the number is even, then the number is divided by 2.) I made sure it can understand the number correctly, and made it stop when the number reaches the end.