he other day I was sitting in a sauna* looking at a led-candle. It was the only flickering light in the darkening evening. At first, I didn’t give it too much attention: it flickered and provided a relaxing atmosphere.

Then I started looking at the flickering, it was a bit random, not too much unlike the flickering of a real candle. Suddenly, I felt a slight breeze of cold air coming through the window and noticed that the led-candle did not react to it, but kept that same rhythm of random light flickering. At that point, it struck me.