Congratulations to YMP, who- or whatever that is. There are some smaller messages written in the same paint, the most cryptic of which says “TIC PIE ACDO.” Anagram? Secret code? Inside joke? Check it out for yourself — in case you didn’t know, many images on this site are fairly large panoramas [this one is 16k+ px wide], so clicking on the image takes you to a full size.
More scribbling by the residents of Maupin 145: The best is yet to come. Sounds good to me.