An emotion is a relatively brief, intense reaction to a specific trigger. Emotions tend to have a clear object or cause, come on quickly, and fade relatively fast, often within seconds or minutes. 

A mood, by contrast, is longer-lasting, lower-intensity, and diffuse rather than tied to one clear trigger. You can be in an irritable mood for a whole afternoon without being able to point to what caused it, or feel generally melancholic for days. Moods form a kind of background emotional weather that colors how you interpret and react to things, whereas emotions are more like discrete weather events happening within that climate. 

I sat in a tower and watched weather roll over. city, and interpreted moods which often seem to come through us in a mysterious way, much like sun, clouds, rain, and wind. Each one folds and unfolds to create various geometric appearances, as I was traveling and needed them to be compact-able This led to unexpected sculptural qualities.