There are a few different variations on the fishbone stitch, including open fishbone stitch and raised fishbone stitch.
At the top of the shape bring the needle up close to the centre top
Start by creating a vertical line down the centre of the shape about 1cm long
Take the needle down through the fabric at a diagonal angle, completing the stitch just slightly to one side of the centre of the shape
Bring the needle up through the fabric in line with the first stitch but on the other side of the centre line
Take the needle down through the fabric at a diagonal angle completing the stitch in line with the first one
Repeat all the way down the shape, alternating sides A to B then C to D.
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