Since my last post on the subject, I've made about 60 of the little tiles (shown here) to go into the mosaic on my wall. I figured that was about enough to start actually putting them up, so I did. It was just about enough to sketch out the main arcs of the pattern, so there's lots of space still to fill in. I've only put green tiles up so far. I've got a few blue ones as well, but I'm undecided about how those will fit in. Also, the curve of the smallest arc probably needs adjusting. But anyway, stuff is up and it's looking good so far.