A knotty situation

And tonight I'm creating knots:

This is one of those fiddly parts. It takes about as much time to start and end the threads as it does to stitch the bits.  The insides will be satin stitched, which is the next step. I've decided to work from the top down instead of completing all of one type of motif before going on to the next. I think it will be a wee bit more interesting that way.

(Please note that I have managed to avoid referring to Chris' comment on gaseous clouds. Until now.)