Scotch Stitch (Diagonal Method) Diagram 1
Scotch Stitch - Diagonal Method (Diagram 1):
Bring the needle up at A, move up and to the right over one canvas intersection, bring the needle down at B. Bring the needle up at C, move up and to the right over two canvas intersections, bring the needle down at D. Bring the needle up at E, move up and to the right over three  canvas intersections, bring the needle down at F. Bring the needle up at G, move up and to the right over two canvas intersections, bring the needle down at H. Bring the needle up at I, move up and to the right over one canvas intersection, bring the needle down at J. This completes the first Scotch Stitch.
Now, bring the needle up at K, move up and to the right over one canvas intersection, bring the needle down at L. Bring the needle up at M, move up and to the right over two canvas intersections, bring the needle down at N. Bring the needle up at O, move up and to the right over three  canvas intersections, bring the needle down at P. Bring the needle up at Q, move up and to the right over two canvas intersections, bring the needle down at R. Bring the needle up at S, move up and to the right over one canvas intersection, bring the needle down at T. This completes the first row of stitches. Now, continue on to Diagram 2...
Scotch Stitch (Diagonal Methond) Diagram 2
Scotch Stitch - Diagonal Method (Diagram 2):
Beginning where we left off at the end of the first row, we work the second row from bottom to top. In order to make this demonstration easier to follow, the first row is shown in light blue and the second row is shown in dark blue. Bring the needle up at A, move up and to the right over one canvas intersection, bring the needle down at B. Bring the needle up at C, move up and to the right over two canvas intersections, bring the needle down at D. Bring the needle up at E, move up and to the right over three canvas intersections, bring the needle down at F. Bring the needle up at G, move up and to the right over two canvas intersections, bring the needle down at H. Bring the needle up at I, move up and to the right over one canvas intersection, bring the needle down at J. Continue in this manner until the end of the row. Then, work the next row from top to bottom (like the first row).