We observed about 20 lights slightly brighter than stars usually in groups of 2 to 5 move around bizzarly in the sky, doing zig zags, rapidly changing directions, appearing and dissapearing seamlessly for about 20 minutes. Sometimes the lights would stop close to each other for a moment and then go off into individual directions. One particular light moved so rapidly, you could barely track its path and it would then sometimes proceed to stand still or slow down for a bit.