black rectangle object that changed colors and it was flying zig-zag over the sky.A black rectangle shaped object that moved forward and backwards in the sky before it vanished after speeding up. It started when my dog started to look up in the sky and snarl. Then i saw it moving zig-zag in the sky. It had 1 light in each corner of the rectangle and 8 lights distributed on the rest of the sides. First it was white then it turned into red and then white again and before it disapeared it was red again.