Rainbow

The first day I walked around outside only with a T-Shirt. Must have been almost 20°C. Too bad that I hadn’t had some really rockin’ music in my car.
Later in the afternoon I heard the first little thunderstorm of this year. Usually I’m a little afraid of thunder but this time there was a cute rainbow right behind my office to calm me down.
I do know the physical principle of a rainbow but I’m astonished every time about the ardor of colors that nature uses for such a useless thing - but I really love it.