I was in town in swindon, waiting at the bus stop. just looklng forward .It is a bus terminal so very busy .There are office buildings in front of me.Ijust glanced up at the sky it was a nice day a lovely blue sky. i saw 4 , what looked like pieces of paper floating on top of a office building.I thought they must have got caught up in a up draft, there was a unit under where they were floating ,what i assumed was a air conditioning unit .I watched them for about a minute,and then to my amazement they flew away in different directions.1 went stright ahead andthe other 3 went to the right they were gone in seconds.Iwas in shock i wanted to ask someone if they saw it ,but the only other person at my busstop was a lady who was sat with her back to the building she was reading a mags. when i was on the bus i was shaking ,i kept looking up to the sky all the way home 25mins. journey.I know their not the norm for ufos but we just have no idea what is out there .The incident has always bothered me , wondering what they were.