Portuguese border stitch

This fourth TAST-stitch looked very complicated at first sight, but that was not the case. I started with the 2 rows at the left side with perle 5, one in dark and one in light blue. The dark one is decorated with French knots in light blue. The yellow row is done with 4 threads of stranded DMC, but I was not so happy with the result. This stitch made me think of knitting, but I cannot use a wool thread because of an allergy. In my stash was a blue acrylic yarn, made for mending socks! I never used it, so I tried it for this stitch. It was an awful thread to stitch with!The 2 rows at the right side look like a heavy chain stitch and that was not how I wanted them to look. And I was not happy with the beginnings and endings of the rows too. I wanted to see if this stitch could be worked in a circle. First I made a large (1 inch or 2½ cm) whipped spiders wheel with light green perle 5, until there was just enough space left for the Portuguese border stitch. I used a darker green for that and I embroidered counter clockwise. That way I could first embroider the side next to the whipped wheel. This worked very well, when I was finished I could not tell where I started it.