Interesting centre! What does it look like with a few more isolated squares around the centre?
And put a few isolated squares in the blank spaces around the outside too. Between the two I probably changed the first to the second in two or three steps, and saved the ones in between as well.
There is not a lot of difference between these two designs, but they are a good example of how I design lots of quilts in a short time. In this example I have made a minor change to the overall design to create the second one, and if I was trying to design a quilt to actually make I would choose the one I liked most.
And then make a few more changes to see if I could make it better.
Playing with a design on the computer allows me to save heaps of slight variations which I can then look at again and keep modifying until I have the best design possible.
Much quicker than rearranging blocks on a design wall, though nowhere near as much exercise!