Basement 4 and Other Things

The guys left our basement after working all day. They built in several windows and it's finally bright enough to see in the basement. They also cut two door holes. When they left, we found that they discovered an arrow (from my bro's bow and arrow kit) that he had lost.
A few minutes ago there were these bright flashes in the sky. At first we thought they were lightning, but there was no thunder and they were not quite bright enough. We decided that they might be camera flashes, but we found no people and there were too many of them.
After that, we saw a UFO. It was definitely not an airplane! It was bright enough to see that it was a triangle. There were lights on it that were flashing like on a squad car. Instead of having a red light on each wing and a white light on the nose, it had a white light on one wing and a red light on the other. It also had a red light on the nose. I didn't get a picture but I did have two witnesses with me.
The wind kept changing direction every few seconds and the sky was very cloudy. It's perfect for a storm.