Inspired by Pablo Picassos light paintings, an artist has created light pen drawings that map the geographical mentions in hip hop lyrics. Last year, Tahir Hemphill set out to create a database containing every lyric in rap history for his Kickstarter-funded Hip Hop Word Count project, and hes now using that data to find patterns in the language rappers use. After visualizing the paths in 3D, he used the model to plot paths for a robot arm, which drew them out while holding a light pen.