Week 3 TAST (take a stitch Tuesday with Sharon) is the
feather stitch.
I used it to fill a triangle.
I've used this one before on temari to make sea weed for my Goldfish.
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Week 4 -
The cretan stitch is totally new to me. It's just a little change on the stitches we've done so far - buttonhole, fly, and feather. I stitched a single line with bright green thread and then tried filling a couple of adjacent triangles. Pretty cool!