on bbc news about an hour ago olympic stadium testing lights looked like a ufo

the guy reading the olympic news was sat in front of a window with the olympic stadium directly behind him,and they were testing sound and lights...the guy said they were playing a very famous beatles song but didnt say what song it was..but interestingly there were lights going all around the top in a circle but the lights were all diferent colors and seemed to be spinning round just like a ufo or whatever u wanna call it..the whole stadium was lookin like some kind of mad space ship