Sitting on our couch looking out the big picture window that faces due west. noticed a vivid flashing light that looked too bright and low to be a star. after using binoculars to get a better look at it, it became clear that it was not a planet/star. my girlfriend and i watched this light with the binoculars and the naked eye. through the binoculars we witnessed the light flashing and pulsing white, yellow, green, red and blue. after 15 minutes of watching it flash, it began to dim and seemed to move slightly to the right. after about 5 minutes of it fading, it disappeared completely.