This one will be like E but with vertical lines. First we want to start with a good size sketch pad or paper on a normal easel at a slight angle. Then using arm motion only make long strait lines from one top to bottom of the paper and working your way across from left to right. Do the lines from point to point without stopping and going over your lines again. These lines need to perfectly parallel to the side of the paper. You will find this much harder than it sounds. Practice this until you can make really perfectly strait and parallel lines. This should be easy to judge even if you have to get out a ruler to check your self. And remember be honest with your self on this.