Outside of work place taking a break about midnight or later no sure of time. I saw a bright light moving up and down and then side to side in a zig zag motion. I watched this for about 20 minutes then it blinked out. This light was NE of moon Made the hair stand up on my neck just watching it. Light was below tree line by at least a quarter of tree height. believe the light was red and yellow more red on top than yellow on the bottom. Then as I watched it, it blinked and was gone.