If you cast your minds back, you may remember a project at MIT that transformed a typical campus building into a big game of Tetris. But it looks like Drexel University has its own classic game project to challenge MITris, only this one is much bigger.

Drexel University professor Frank Lee set up an enormous game of Pong on the side of Philadelphia's 29-story Circa Centre that you can actually play. The idea came to Frank when he looked up at the lights of the building one night, and imagined a Pong game using the windows at pixels.

Fortunately for Frank, the Circa Centre already has 1,500 decorative LEDs on its facade that are lit to mark holidays or sporting events. According to Polygon, it took Frank five years to develop the project – a process that included getting permissions from building management and writing the necessary code to make the whole thing work.

You don't have long to see this giant game of Pong in person, though: The installation is part of Philly Tech Week 2013, which runs through April 27.