No, that isn't. That's letter by letter. This is layering different letters  by using different colors. That way, "M T O" all appear on the same spot because the bricks used between different letters show in both or all three of the colors. I should record what I got and gif it like Nymethus just to show you.
By using cyan, magenta, yellow, and white?
Then those painted bricks would light up during two of the colors (all three for white)
I added a column to my colorset just for this:
0 0 0 255
255 0 0 255
0 255 0 255
0 0 255 255
255 255 0 255
255 0 255 255
0 255 255 255
255 255 255 255
255 255 255 32
DIV: Pure
(The last one is just a slightly more transparent white)