There is an app/program that helps you change an image into a QR code - but I don't know what its called - a lot of players will know what I mean tho and should be able to give a link.
These are two basic guides to making brick work patterns yourself. They are just the basics, not sure if they were added to or reworked. Would also love to see some links to other guides.
honestly i found it best to just look at alot of other paths and them come up with about 8 or more different paths, ones with a "side-stone" outline that makes each path perfect for any scenario. it's just like using photoshop or sai, pick out base colors for the stones and then give them an light and a dark color to ad shade and lumi. It will take almost a day but at least a few hours to come up with a base and get to work but it's well worth it!(once you have a base complete it's easy to do the others)