WASHINGTON - Blue and red areas on a map typically represent political divides, but a project by Global Twitter Heartbeat is using the colors to show whether Twitter users are happy or sad.
The machine collects more than 400 million tweets within the U.S. and converts them into colored spots on a Live Global Twitter Heartbeat map.
On the map, shades of red represent negative feelings, while shades of blue symbolize positive emotion.
During election week, the computer tracked tweets from supporters of President Barack Obama and former Gov. Mitt Romney. Based on the tweets, the computer produced a fairly accurate map -- blue for Obama, red for Romney -- of how Americans were feeling about the candidates.