If there is a most oft-uttered criticism of CityCenterDC — beyond its apartments and shops being too pricey — it’s that the six buildings in the first phase are too boxy. That they fit into Washington a little too well.

As of last week, the project will stand out a little more, thanks to digital media artist, producer and director David Niles. Niles, the CityCenter’s developers and Mayor Vincent C. Gray flipped the switch last week on a 25-foot-high, 50-foot-wide electronic art installation.

Called “The Gateway,” its speakers and high-resolution screens adjust the images and sounds they play based on activity on the sidewalks nearby. Those who have visited the Comcast headquarters in Philadelphia may be reminded of Niles’s work on that building, where there is a similar 25-by-80-foot, 10-million-pixel LED screen.

Any number of images — acrobats, bubbles, bicycles — could go dancing past during a walk by or through the arch. Try it for yourself between 8 a.m. and 11 p.m., just west of 925 H St. NW.