It is market day in the piazza, and pixel Leonardo da Vinci has brought his newest toy invention to show the market crowd: a wooden duckling on little wheels with a tiny spring inside that waddles wherever he walks. Wind one up and it follows him. Wind up the next and it follows the first. Soon the whole square is watching a tiny parade that the crowd names the Clockwork Ducklings.
Every pot of paint he picks up gives one more bare wooden duckling a bright coat of yellow or blue, and it waddles off to join the back of the line, which speeds up a little each time. A low stone balustrade rings the piazza, so one wrong turn ends the show, and so does tripping over his own ducklings. Now and then a golden winding key gleams on the bricks for a few seconds, worth a special bonus. How long can the line get before the market closes?
