Lorna - I was planning on posting this anyway, but now seems as good time as any.
Traditional design from the North Country (UK) - Weardale Chain
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If you look at the shape drawn in green you will see that it is based on the old flat iron as a template.
Same pattern adapted for machining
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This can be done in six passes, using a walking foot and sewing around templates (if you have location marks for placing the templates).
These are the templates I used for my flying geese border{!-- ia0 -->img440.jpg{!-- ia0 -->
You can easily make your own templates to fit your space by folding a sheet of paper in four and drawing & cutting the shape, but don't stop with the first one - this was no 3 attempt before I was happy with the curves.