Mid February. we were flying alligant air at about 25000 ft. I had the windowlooking out the window, saw a round silver object about 100 yards of the left wing. It was a very cloudy day, it appeared to be pacing with the aircraft, I observed the object of and on four about 15 minutes. Then it turned sidewase of bottom up. there were a ring of lghtson the bottom. the were red blue green and purple and yellow, they seemed to rotate or the ship or craft was turning very fast,in the clouds it was rather hard to lmake out. I asked one of the sturdest if shejoyed the coumpny, but she was as white as a sheet. apparently i was not the only onewho saw the unusual situation over all it lasted about 30 minutes this time. I have others but this is far as i have been able to go, my computer shuts down , I have more4 evidence but if i go further ill be shut down agalnn, I am being under constant observation