Here's how it works: If you're on mobile, point the charging port at your face, look at the image, and squint really hard. Then, turn your phone so the volume buttons are pointing at you and do the same thing. If you're not on mobile, take a picture of it and do the above. Note: You might need to enable your orientation lock.
Do NOT give away how it's done in the comments, because it spoils it. Also no advertising, all that stuff goes here: https://scratch.mit.edu/studios/29180283/comments If you figure out how it works, make one of your own and post it here: https://scratch.mit.edu/discuss/topic/622342/