Example on use of separator and skip blanks

If you want a grid without elements you can use a separator different from the default (blank) with a blank in every field. for ex.
, , return
, , return
, , return
with separator ","

If you want produce the gif of this magic square

 1 23 20 14  7
15  9  2 21 18
22 16 13 10  4
 8  5 24 17 11
19 12  6  3 25
You can use the default separator with the option Skip blanks. The option Skip blanks deletes every initial line sequence of blanks and trasforms the other sequences of blanks in the blank, if the separator is blank or deletes them. 1