We were driving on I64 about 20 miles south of Marion when we saw a white ball cross the Interstate at 20 feet in the air. The white ball joined a group of other white flashing balls that were in a formation of 3 stacks of 3 balls. Suddenly they formed a triangle and the balls kept going faster and faster in the shape of the triangle. The light was very bright and flashing. We wanted to pull over to get photo's but we couldn't because of the traffic. It was UNBELIEVABLE-like something out of a Sci-Fi show. I was with my wife and 2 kids.