Please draw only on a white sheet of paper without lines or checks, e.g. printer paper or special paper for painting and drawing. Use a black pen that covers very well, e.g. Molotow markers or similar. Size of your drawing: 110 x 38 mm or 38 x 110 mm. When you're done, scan your drawing at the highest quality using a scanner or smartphone app such as iScanner (iPhone). A simple photo of your drawing is not sufficient.