Thank you Cameron,
That's helpful, and echoes MJ's points, too. I rose with dawn (not quite) but did put some work in this morning before work and had a play with the image that isn't working for people- screen shot below but
better quality image here.
I'll work on the text when I've finished for today. I like your idea about ordering. I'll have a think about how that might work. I think the text could offer some clues to that, too.
Sarah-Jane