The Grid, You Know?

It was huge with 50 to 100 individual light sources perfectly spaced in a flat grid at first. The lights were changing colors flashing all colors of the rainbow super quickly and moving into a saucer-like shape. They then started floating up. It had some kind of beam coming from the ground and only appeared to be light, but absolutely moved like it was one unit from the surface. And then it changed colors and flew away and disappeared completely.