square, I drew a line along one long wall, the a parallel line along one short wall, then stenciled my first row of squares, making sure two corners of the square touched each of the lines for the first one, the the line and the tip of the previous square for the rest of the row. It is not an exacting method, but I was going for an aged, worn look. I dry brushed the paint on, leaving lighter areas to further create a time worn look. The open square I left in their natural concrete state.