The pattern is a sort of windmill shape which you can see quite well on this photo on the loom...
...and below you can see it clearly on the close-up too although in real life you need to kind of let your eyes go out of focus to spot the pattern.
Here's a final pic of the finished article and one of Margot modelling it.
I'm quite pleased with how it turned out - at least I understand the loom an awful lot better now! Although I did make a mistake on the threading and of course it's replicated throughout the whole scarf. Still, on to the next project!