Choose an 8-karat paper that is suitable for writing with a hard pen, find a longer ruler, and calculate the grid to be drawn based on what is written, paying attention to leaving margins around it. Generally, red is used for grids. The red color is bright and can create a bright and best effect with white paper and black characters. The advantage of doing it yourself rather than buying it ready-made is that you can do whatever you want, as big a grid as you want, and in whatever form you want.