Today I spent an entire day at home, looking over my answers to GRE diagnostic test, correcting my mistakes, reading over math section, etc, etc, etc.
The day was gloomy and cloudy, but then all of a sudden the skies cleared up and the sun came out. I contemplated going outside, but there was just too much to do. I stayed home. And then, it began pouring, hard! And what appeared? A rainbow!