TAST stitch 82 is Spanish feather stitch. TAST stands for Take A Stitch Tuesday, a challenge at Pin Tangle.
This is a progress photo of the blue row in perle 8. I started the stitch very close to where the thread emerged.
Here you can see how I stitched the green row in cotton a broder. The purple row in perle 5 has the same rhythm, but is twice as big. It inspired me to another experiment, . . .
. . . a beaded Spanish feather stitch. This one is done with perle 8 and 2 mm beads.
Before making a stitch I put 2 beads on the thread. One very close to where the thread emerged, the other at the other side of the needle.
Take a closer look at my Spanish feather stitch sampler here.