Script issue

Hello ,

How can write while script this (A) senerio?
A(
I have two folders names : new and old
-new- folder empty
-old- folder has 10 images files its names 30-31-32-33-34-35-36-37-38-39-40.

and i d like create -new- folder inside, ::
like this

-New-{
30(folder){
30 names images x3 copy and its name has been 1,2,3
}
31(folder){
31 names images x3 copy and its name has been 1,2,3
}
.....

}

)

Thankss :)

This doesn't make any sense - please try to explain clearly what you want to achieve with a clear example.