Can anyone explain this

1. Add a script manager control
2. Add a script called forward
1. Add the Forward() script command
3. Add a script called rightturn
1. Add the Right() script command
4. Add the Floor Map control
1. Set it up like this:
A.Number of pixels/second moving forward or reverse: 10
B.Number of degrees/second turning: 10
5. Set up a custom movement control
1. Add the foward script to forward command
2. Add the right script to right command
6. Add this script and call it Box

Code:

:LoopStart
Forward(255,5000)
Right(255, 9000)
Goto(LoopStart)