I'm learning so much doing the 100 details. Detail 30 is the up and down blanket stitch. It took a fair bit of practice, but once I got the hang of it, it was easy to do. Here's how it looks. This was my first attempt:The second go was more like Sharonb's example.
This is detail 31, the example showed yarn couched. I couldn't find yarn that fit, so I used some raffia and 4mm silk ribbon. I think it worked out very well.