Take a photograph and print it on a nice piece of photo paper. Hand the photo to a friend along with a sharpie. Ask them to write a short message to you on t

Take a photograph and print it on a nice piece of photo paper. Hand the photo to a friend along with a sharpie. Ask them to write a short message to you on the photo’s surface. Scan the result, then write some code to produce an image of the message in black on a white background. Well done, it’s probably very close! Now repeat the exercise using a blank sheet of white paper instead of a printed photo. This is your call with headphones, vs a call on speakerphone! (Bonus points if you chose a photo of some sharpie writing on a white surface for the first part of this exercise. This is you on speakerphone in a public space filled with people using speakerphones to also make calls.)