Working it in a window

Last Thursday, during Fashion Week, designer Zac Posen worked in a window at Bergdorf Goodman at Fifth Ave. and 57th St. spray-painting a dress on a live model as a crowd gathered on the sidewalk to watch. Posen wrapped the model’s white dress with black electrical tape, then sprayed blue paint over it all, which created a funky, geometric-type pattern when the tape was removed.