I saw this cheerful little sticker somewhere on 11th Avenue when I was on an afternoon gallery crawl in Chelsea last week. It appears to be part of the 100 Day Project, which you can read more about at This Link!
I saw a couple of these Homer Made To Stay stickers — where the “O” in Homer is a Pink Frosted Sprinkled Donut — on 11th Avenue between 18th and 20th Streets when I was in that area recently. I can’t find any reference to its meaning or creator on the Google. And so, it remains a mystery until someone leaves an enlightening message in the comments; which means you’ll be waiting a long, long time.