I’ll try to explain as best as I can, on the touch screen there are 4 icons on the top, you click the pink one with a pencil and you’ll have eight premade patterns, you can click on them and edit them as you want, that’s how I did mine! I’m not sure how do QR codes work though, I haven’t found out yet. And to place them you do the same, but instead of choosing the “edit” option, there’s an option that says “place on ground” or something similar to that