This bit of art was yet another experiment with drawing tools. I had recently installed Krita (https://krita.org/en/) a free and open-source digital painting program available for every major desktop environment, and I was exploring its tools.
Krita has an interesting multi-brush tool, which allows you to paint multiple lines at once mirrored in a couple different directions. That's what I used to create the main shape. The rest was done with the color fill tool. It's a quick and easy tool to use that can produce interesting results. Considering Krita is free, if art interests you, you should download it and give it a look.