It’s not much of a picture, but it does illustrate a point. We had taken the dog to be groomed and when we went to pick him up I noticed wonderful light on the hills opposite the store. The trouble was that it was difficult to get a picture because the hills were on the other side of a parking lot with lots of lights that partially obstructed the view. So I thought that if I moved to a different position I might be able to find somewhere where the lights weren’t to obvious. I set out walking across the parking lot. Part of the way across I noticed that the light was disappearing and decided to take a picture before it went altogether. It was already to late – the wonderful light that I’d seen earlier had gone. A few seconds later the hills were almost completely dark. A short walk (probably only a minute or so) across a parking lot had been enough for the light to evaporate.