The phenomenon of lightning is still not fully understood until today. I use this natural phenomenon of lightning for a video projection of a real thunderstorm on the inner south wall of St. Andrew's Church. The flashes in the video became "heavenly signs", because I stretched the time in the video to about a hundred thousand times, so that the lightning pass slowly and overlap. The sound of the accompanying thunder can be heard unaltered and realistic.

This creates "cracks" of light, bright "horizons", signs of nature in an only partially scientific characterized environment.
The signs of the nature of human existence as important as the signs of times, the church must recognize in order to
constantly changing to maintain over time.