Post-It War Gets Sticky on New York City Office Windows

An employee creates an image on a window with Post-it notes at the Horizon Media offices at 75 Varick Street in lower Manhattan, New York City on May 18, 2016, where advertising agencies and other companies have started what is being called a "Post-it note art war" with employees in buildings across Canal street from each other creating colorful images in their windows with Post-it notes.

The Apple logo and Batman images created with Post-it notes are on the windows of offices at 75 Varick Street, Manhattan on May 18.

Angry Birds created with Post-it notes are on a window of the Horizon Media offices at 75 Varick Street, Manhattan on May 18.

Images created with Post-it notes are on windows of 200 Hudson street, Manhattan on May 18.

An image of the Snapchat logo created with Post-it notes on the windows of Havas Worldwide at 200 Hudson Street in lower Manhattan, on May 18.

Part of the Snapchat image crated with Post it notes at the offices of Havas Worldwide in lower Manhattan, on May 18.

Images created with Post-it notes are on the windows of offices at 75 Varick Street, Manhattan on May 18.

A message created with Post-it notes that reads "Hello from the other side" on the windows of 200 Hudson street, Manhattan on May 18.

Employees make a U.S. flag on a window with Post-it notes at the Horizon Media offices at 75 Varick Street, Manhattan on May 18.

A message reading "Marry Me?" with Post-it notes is stuck on the windows of 200 Hudson street, Manhattan, on May 18.

A mannequin stands near images created with Post-it notes in windows at 200 Hudson street, Manhattan on May 18.

Employees make a U.S. flag on a window with Post-it notes at the Horizon Media offices at 75 Varick Street, Manhattan on May 18.

An employee creates a rainbow image on a window with Post-it notes at the Horizon Media offices at 75 Varick Street, Manhattan.