Check up the rules here. Solution soon!
"I've made something that might be interesting for your fan art section. Have you ever heard of Picross' or Nonograms? These are some sort of
logic picture puzzles. I've created some of these puzzles a while ago, one of them showing our great Cthulhu. Although it's 20x20 in size, it's fairly easy to do, so even beginners should be able to solve it. I tested it and it can besaved purely by logic, without any guessing necessary."
And the Solution is Here