Remember the old Winky Dink TV show, in the 1950s? Remember how we bugged our parents to send away for the Winky Dink Magic Kit, so we could put the Magic Screen over the TV screen and, with our special Magic Crayons, trace the arcane shapes and scrawls presented to us, until they came together to form a secret message?
Regrettably, a lot of us couldn’t wait for the Magic Kit, so we took ordinary non-magic crayons and scrawled all over the TV screen itself, producing a mass of gibberish that somehow never pleased our folks. It worked just fine, as long as you put up the Magic Screen first. But without the Magic Screen… well, live and learn.