Unidentified craft circling my neighborhood.Very low flying craft approx 20 ft wide with a bright light on the end of the two wings. Looked like a triangle with the point being at the rear. Circled in a wide circle over my house and court 5 times. Sounded like a small moped. It flew by very low and fast from the left and circled the court and then down the street and we could still hear it then approx 10 mins later it passed again a little more over the house and down the court, approx 10-15 mins later it passed again but on the other side of the house. The next circle was over the house again but a little slower. The next time was only a couple minutes later, and it was a couple houses down, the final time it passed at the end of the street, 4 houses down. We could still hear it but didn't see it again.