About Pixel Paint - These colouring pictures are made of original Griddlers puzzles. Though the puzzles themselves requires logic to solve them, the results are always very nice images. For those of you who prefer to relax when solving puzzles we decided to convert these nice images into a coloring book. How to color - Every coloring grid has colored cells on top and left with numbers. The numbered cells are "Clues." Each clue indicates the number of squares you need to fill. The clues are in order and represent the number of cells you need to fill from left to right or from top to bottom.