The wether was unstable through the day. Around the noon, it was fine. I thus thought it would be nice if I had a lunch on top of the hill behind the institute and drove there. It was however farther than I expected; it took almost half an hour to reach there. (I was lost once on my way.) It was fine when I reached there. I overlooked the institute and the sea, but it started to rain soon. I drove down to chair a seminar with students, having finished eating my lunch.
I noticed of a rainbow while I was preparing for the seminar. I notified my students of the rainbow. We all went out to the balcony to see it. We counted the number of colors it contains. I only recognized six, missing indigo.
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