Double Herringbone Stitch
First produce a row of Herringbone stitches from left to right. This time however you pass the needle under the first diagonal stitch. Then using a contrasting thread and starting at the left again bring your needle up at 1, down at 2 and up at 3. Take your needle down at 4 and then back up at 5. Pass your needle under the diagonal stitch you just made to begin again. This stitch is a little tricky but really does make a nice border when you get the hang of it!