US dons play Tetris on skyscraper's sides

A US university professor and his two colleagues have created a computer program that allowed them to play Tetris on two sides of a 29-storey skyscraper.

All the pieces have fallen into place for the designer of a giant Tetris game as it entered the record books.

Drexel University professor Frank Lee and two colleagues created a computer program to play the classic shape-fitting puzzle on two sides of a 29-storey skyscraper in Philadelphia, in the US state of Pennsylvannia.

They used hundreds of lights embedded in the glass facades of the Cira Centre, with the area stretching over 120,000sq ft.

Dozens of Tetris enthusiasts played the supersized version in April using a joystick from about a mile away. It has now earned a Guinness World Record for the largest architectural video game display, beating the previous record - which was also set by Prof Lee with a giant game of Atari classic Pong.