Bistability of apparent movement: The ring appears to rotate clockwise or counterclockwise.... http://fb.me/83V9Gr9ZC
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Bistability of apparent movement: The ring appears to rotate clockwise or counterclockwise.... http://fb.me/83V9Gr9ZC