Press left and right arrows to choose a QR code, then scan it with a QR code reader app on your phone! To see how the list-based QR codes were created in the first place, press the space key, use the left and right arrow keys to choose a QR code, press 1 to scan it, and then press 2 to transcribe it into ASCII code.
The ability of QR code readers to interpret janky QR codes is amazing! (Because the QR codes in list form are not perfect, you may to move your phone around to get your app to read them.) For a real tour de force of Scratch programming, see @-Jie- 's amazing QR Code Generator: https://scratch.mit.edu/projects/31270656/