And when I enter the pair "matrix" and "poem" into a Google Search, the results include poems with the word "matrix" in the title AND rectangular arrays including this one from Eleven Matrix Poems by Roy Lisker and found at this source. Reading instruction includes this:
Matrix poems are written to be read in all of the directions
indicated by their accompanying diagrams.
|"RESIST" by Roy Lisker|
My favorite line is shown as the second column; which is yours?
Fight Ever Will To Never EvadeIn closing, one more remark about the Google Search I performed using "matrix poem"; as with many Google searches there was a link to images, and from that I found a delightful array of word-diagrams such as the one above. Try it sometime!