I made the pattern in Illustrator. It’s been awhile since I’ve made one. But the Illustrator tools make it so easy to create a pattern. I don’t know what other program you’d use. Photoshop? That would be difficult.
My Society6 shop hasn’t been around that long. I have a few prints on there for my Queen III painting, a color version of Little Red, and a print made from an old etching. I like the idea of a shop like this because they can put the image on a number of different products and I don’t have to worry about shipping. I may still move over to Etsy for my art prints in the future but for now (and my current budget) this works.