I would be following a curved stitch line for the illustration.
|Fig 1: Begin the stitch by making a simple chain stitch loop.||Fig 2: Now put in the needle at the left of the chain to begin a twisted chain loop.|
|Fig 3: Loop the thread around and pull out the needle for a twisted chain.||Fig 4: The pattern would look like this. Continue it with a chain stitch and twisted chain stitches in an alternate pattern.|
|Fig 5: Your finished pattern would look like this.|