Sept.15 2015. Observed a stationary object which appeared to be around 4000 ft in the air with lights that constantly rotated in a green red blue yellow white pattern and never changed during observation. Checked against Google sky and active radar with nothing being close to the same area. After 20 min. The anomaly began to descend out if sight. This is the second time we have witnessed this object in the same area last time being approx. 4 months ago and followed same path.