It looks like Wargames but with Skittles: colored balls representing immigrants arcing through low orbit to land somewhere within the United States of America—Oklahoma, by the looks of it. Creator Max Galka writes that it covers 1820 to 2013 and that each dot represents 10,000 people.
It includes only those people who attained permanent resident status. Illegal immigration is not included. Use the controls on the bottom to move back and forth in time or to pause / resume the animation.For more info about the map and a list of data sources, see: 2 Centuries of U.S. Immigration in 1 Animated Map.