You’ve probably seen QR-codes popping up all over the place in the past few years. They are those matrix bar code images that you can scan with a smartphone and get linked to online content. The codes are primarily used in advertising, but German street artist Sweza has been using them in a different way for several years now.

Watch this video of DW-TV interviewing Sweza to see the different ways he has been utilizing QR codes. Cool stuff!