Without sound, and very well lit-up, it sparatically moved left to right, at times glidding downward at a right angle.The craft was as high up as planes fly, but at least 5 times the size. The shape was odd. It was long, and one side (the left, from ground view) went upward. As if you were looking at an "L", only the horrizontal line leaned toward the left. The movement of this craft was right and left movements. It did not move straight down, instead, it moved downward gliding to the right. It was sometimes fast in its longer movements ( lft to rt ) and moved not slow, but slower, when moving shorter distances of left to right. For the most part, it just went back and forth, (lft to rt). I saw no paticular color, it was lit up as planes are, with one light being stonger and bigger than the rest wich covered the craft one side to the other. There was no colored lighting...just white.