Question for PostScript gurus

[TaoCG]

Hi,

I am trying to get more into postscript but am currently stuck with
something.
I want to draw a grid and so far I tried to define a square box like this
/box { commands to draw a box } def

and then print the box several times to get a grid.
now it was only a small grid like 4² or 9² it would be easy enough just to
use the translate-command but if the grid gets larger it would lead into a
lot of typing which I am sure can be done simpler. I just haven't found out
how.

So far I have tried the for-command and getting a single line of the grid is
easy.
If I try to put a second line it starts where the first has ended though and
I don't know how to change it.
I thought a simple x y moveto would be enough but it doesn't seem to do
anything.

I also thought about using an array but I don't really get how they work in
PS and I couldn't find good explanations online.

If someone can help me out or point me to a good online resource, I'd be
very grateful.

Regards,

Tao
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