“I LOOKED down at the spots on the pavement, where kids waiting for the bus had dropped wads of gum for years. The sun had seared them black, fried them flat. This concrete constellation held a secret that I knew could be unlocked. I went home and returned with a jar of paint and brush, connected the dots. A pattern emerged. I will share it with you. Be on the #12 bus at midnight, corner of Wrigley & HubbaBubba.”