Step 5: Now for the fun part: Every single line from this point forward will, for the most part, be a diagonal line. You will have a few horizontal lines to start off with, about six. Aside from those, all lines will run askew from your grid. This is where you can get creative. If you want your pattern to look random, it will need to be fairly well thought out. Move around the wall as you go so that you vary your pattern making. Less is more, so give the eye a place to rest every so many lines.