3 colorful lights stationary, than one by one they would disappear to the south

It was my during my graduation of high school at the WSU Vancouver campus. My friend and I were sitting in the grass celebrating graduation. After a while of being there that night, we had noticed 3 stationary colorful lights towards the east side of the campus. After noticing them for about 15 minutes, the farthest light to the east disappeared at incredible speeds to the south. After about another 5 minutes the middle light did the same thing. About another 5-10 minutes had gone by and the last light had followed the other’s direction. I am now 25 years old and still cannot get what I saw out of my head. I have never been able to figure out where to send this information to nor who I could trust to tell. It was the most incredible phenomenon I have ever seen.