In September 2011 , hackers installed 153 ( = 9 × 17 ) custom-made wirelessly-controlled color-changing high-power LED lights into every window above the first floor of the 295-foot ( 90 m ) tall MIT Green Building . They displayed a waving American flag throughout the evening of September 11 , 2011 in remembrance of the September 11 attacks of 2001 . For a short time in the early morning of September 12 , the lights displayed a Tetris game , thus realizing a long-standing hack proposal , the " Holy Grail " of hacks . The display hardware had occasional glitches , and was removed as of September 13 . The hardware and software designs were further developed and refined for better reliability . On April 20 , 2012 , MIT hackers successfully turned the Green Building into a huge playable Tetris game , operated from a wireless control podium at a comfortable viewing distance in front of the building . Visitors to Campus Preview Weekend ( a gathering for admitted prospective freshman students ) were invited to play the game on the colossal display grid ( 80 ft. wide × 250 ft. high ) , which was claimed to be the second-largest full-color video display in the US
September 11 attacks
September 11 attacks
Hacks at the Massachusetts Institute of Technology