I used the pattern image to calculate how many squares of each colour I would need, and made bunch of half square triangles with one red half. Once I'd sewn all of my pieces together, I laid them out to get an idea of what the final product would look like. This is what I got:
Once I had the correct number of pieces, I experimented with different ways to assemble them. I tried three different methods of pressing, one for each cross. There are some tutorials out there with pressing instructions for a Dutch pinwheel block, but for me they inevitably led to lumpy spots. The best way I found was to start by sewing the 4-patches with seams pressed towards the dark, except the outer corner piece which is pressed the opposite way. When putting those 4-patch squares together, press the seams open.
I cut some strips for a border and used this gorgeous yellow flame fabric for the back. I have no idea what the print is called. I wish I'd bought more of it at the time.