I said I would take a picture of my four patches - and I finally did.
There's a saying that done is better than perfect. This little top is about half completed, and it is nowhere near perfect. But I am happy to say that my corners are matching better than they used to.
And I haven't totally given up the alternating dark/light pattern. However, this particular top is mainly a jumble of squares. I'm considering it a learning experience. And one thing I learned is that the 2" squares are not all 100% cotton. Some of them shrunk a little bit when I ironed them. It makes life interesting.