The classic video game Tetris is played on the 29-story Cira Centre in Philadelphia, Saturday April 5, 2014, using hundreds of LED lights embedded in its glass facade.
Read: Tetris Played on 100,000-Sq.-Ft. ‘Screen’
The spectacle kicks off a citywide series of events called Philly Tech Week and also celebrates the upcoming 30th anniversary of Tetris. (AP Photo/ Joseph Kaczmarek)
Frank Lee, right, a Drexel University game-design professor, and game designer Henk Rogers, center, play the classic video game Tetris on the 29-story Cira Centre.