AUTOMATIC NIGHT TORCH

Automatic night torch that turns on when it gets dim and off when light returns. The torch is brightest when it is dim. When it gets dark, the brightness of the torch becomes roughly like that of a small candle in order not to be too bright in the middle of a night. Occasionally the flame performs short dances in the colors of the rainbow. The flashes are by default quite short and infrequent, but it should be easy to find and modify them in the sketch.