This week's stitch took me a while to decipher but once I experimented with the double chain, I worked out what to do and here is my attempt at a Buttonholed Double Chain:

What I discovered is that a) you have to watch to be certain you don't twist the chain part and b) you really have to be careful you don't stitch it to your bedsheet!* LOL

*Yes, I do stitch in bed!