Louisville, Ky. (WHAS11) - There are many ways to play the classic video game Tetris; on a PC, smartphone, video game console--and now, even on the sides of buildings.
Organizers are calling this the world's largest game of Tetris.
A version of the game was created using computer-controlled LED lights on Philladelphia's 29-story Cira Center.
A few lucky players were given an arcade-style joystick to control the falling blocks. The event was part of celebrations marking the 30th anniversary of Tetris, one of the best selling video games of all time.
Click on the video above to see how it works.