Strange light formation appeared to be surveying residential area

While taking my dog out quickly in my yard I saw in the sky about 13-15 strange lights in the sky, they were very large and dull in color as though they were high above the clouds. 10-12 of them were white and flying extremely fast in sync with each other making swirly shapes together, these lights would disappear for a bit and re appear every so often. Surrounding these white moving lights were three black stagnant dim lights in almost a triangular shape surround the white lights that consistently stayed present. After watching this for a few minutes I returned inside and about twenty minutes later checked again to see the formation now flying over the whole neighborhood. It almost reminded me of a very strong light show that a Las Vegas casino would have but this was in a very small residential area with no possible way of having any lights this strong.