When I need to “manually” set large arrays in pixelblaze, I’ve been using a spreadsheet to manipulate and store all the data in, then use a CONCAT() fuction to create a column with
lots of array assignments like
big_array[0][0] = 4
big_array[0][1] = 2
big_array[0][2] = 3
…
then, just copy the column, and paste it into my code.