Looking out over the garden i observed four round balls entering the garden flying over the back gate. they stopped at the back of the garden in front of some pine trees between 5 or 6 foot of the ground. first they stood there for a few seconds in diamond formation then they started to circle around very fast in a oval formation. after a while, some forty or fifty second they stopped as of they observed me watching them and moved towards me in perfect formation closing in to each other while doing so. about 5 inches from the window they stopped and seem to observe me as i observed them. after 40 or 50 seconds they suddenly moved over the garden wall and out of sight.