I initially pictured a more fluid, chaotic spray of black streams, whose widths varied a bit more, with blue-white flowers in them and a sky-blue background. But I also wanted it to look good when tiled, which required keeping the streams the same width at the edges where they intersected.
The result was a simpler, more orderly pattern than I'd originally planned. The darker blue between the diamond shapes was an afterthought, once I got to the stage where the basics were done and I was tinkering to see what looked good.
Here's what it looks like when tiled:
If you want to learn how to draw symmetrical patterns like this, I've got a handy tutorial for you here.
And if you want to wear this pattern or use it to decorate your home, it's available on coffee mugs, dresses, iPhone cases and more in my Society6 store and my RedBubble store.
Here's what it looks like on some of the available items:
Society6 doesn't have a "view everything in this pattern" feature that I know of, so here are the links to the items in the picture above:
Hand & Bath Towels