That part of the article was just background information. You don’t have to go there and do anything with them at all. I’m just explaining the behind the scenes there. The only important thing is this:
You go to the web app on my page. Scan the QR code with that and the PINs should start counting and stop when it found the right one (not with the Koder example app on their page linked somewhere further down in the article). That’s all.