Bright yellowish light bounces back and forth in the cool clear night skyThis is the second sighting of the same UF0 in one month! I haven't been a skeptic, nor a believer entirely until now. On both occasions there was only one UFO that I could tell. It moves very rapidly back and forth, up and down, but mainly stays in the same spot. They emanate a bright yellowish light and every few seconds a brighter more white light streams down from underneath of it.The first time I had spotted it about a month ago, I thought for sure that It must have been an hallucination, until I ran into the house to get my father who assured me it was no hallucination, that he could see it too! Both nights that I have observed it, it was clear cool nights with no moon. Both nights it acted the same way, but this time I'm fairly certain that it was being attacked!! Bright reddish flashes would go off from either side of the craft, like a force field was in place. I noticed a few airplane lights sort of circling it. But the UFO in question still stayed in its spot for the most part. And I gave up watching it after an hour or so.