It was quite a hot night so i and my parants decided to go to our roof top where some wind was blowing .we sat on on a matress.My parents were sitting while i was just laying down.suddenly i saw abeam of light which dashed across the sky stopped at a place in the sky almost perpendicular to my sight .i saw a ship's base which consisted of 3 pentagons .it gave off a very bright white glow and and at the centre of each of these 3 pentagons twas also asmaller blafk coloured pentagon also.i was was just stunned to see it.it stopped for only about a sec. And dashed out of my sight at an incredible speed.yesterday i discussed about this event with my friend and i was really surprised when he told me that he too had one such UFO experience