I have a ruler that shows the size square to cut in half for side triangles and the top and bottom corners.
you do your rows on angle, not straight across so they are easy to do.Now i did green cornerstones. not always necessary.
tallchick gave you a link that should help. just take it row by row. left row with block. then triangles on each side and corner one on top. done there. then go to second row and add triangles on each end. etc. It really isn't very difficult. you are on the right track.
Last edited by nativetexan; 11-08-2018 at 02:02 PM.