The x_room array displays like the following with each line grouped together by the four columns:

(Line,Room)

(1,1)
(1,2)
(1,3)
(1,4)
(2,1)
.
.
.
(25,4)

I want to move through it like this so all the rooms are in order of groups of 25:

(Line,Room)

(1,1)
(2,1)
(3,1)
(4,1)
(5,1)
.
.
.
(25,1)
(1,2)
(2,2)
(3,2)
(4,2)
(5,2)
.
.
.
(25,2)
.
.
.

This is the basic code that goes through it currently:

FOR yy = 1 TO max_room
	FOR xx = 1 TO n_lines
		WAIT WINDOW "Next slot: " + ALLTRIM(STR(x_room( xx, yy )))
	ENDFOR
ENDFOR