Changing red, green sphere, blinking out, moving around mountain, south end of Anthem, Az,. between midnight and dawn.4:15am looked from my upstairs bedroom window to the mountain range/hills on the south end of Anthem,between Anthem and Tramanto. I had seen a similar light last summer, when I had seen other unusual activity on the same mountain all summer long, always in the middle of the night. This time the light changed SLOWLY from red to green, blink off. Then green, red, green, blink off. Then green only, blink off. Red only and blink off. It varied patterns like this the whole time I watched for over an hour. The object slowly moved across that specific area of the mountain, slowly bobbing downward then up, across. It has traversed a good portion of the lower half of the whole hill/mountain. An hour later it is now down close to the bottom of the mountain. Police officers came to my house, upon my call, and saw the object from my front sidewalk. We could all see it as we looked south, between 2 houses, yet a mile away at the base of this mountain. There are people, perhaps 7 houses,living on that mountain, so if it had been a helicopter, the noise would have awakened everyone living in that area. Last year I heard that there is lots of gold in those "hills" and that local kids like to go on their bikes up the desert hills to find small pieces of gold. I only mention this, because a person told me years ago that some civilizations actually drink gold and need it to survive, for some reason. Perhaps there is mining going on.((NUFORC Note: Sirius?))