Animated light show in downtown Toronto

Finally, some computer-controlled building animation here in Toronto. It's not quite the best setup -- only 1-bit pixels (i.e., no shades of gray possible) that are very narrow -- but it's a good start. Hopefully this catches on and we can get some nice building animations, of the calibre of Project Blinkenlights, on this side of the pond.

Challenge: Can you decipher the displayed message? (Hint: The building is currently vacant.)