I refer to this as a piece because songs have lyrics, or are just considered so. This is truly a piece of music, therefore earning the title of piece. As I listen I can actually hear the transition between seasons. Right there towards the end, at about 3:20 the almost flute sounding thing in the background... winter? Summer seemed the upbeat in the early middle melded slightly with spring. The way the sound transitioned worked like the seasons do, a seamless meld with slight accent points at the event of transition but not overbearing. All in all an awesome work.