I just thought of something. Is'nt it weird. Or...It's actually kind of creepy. Because this man, Bach, he uses his talent to write a prelude and a perfect fugue over each and every key in the well-tempered(wohl-temperierte) tonal system as we know it. If you just imagine the work and effort that must've costed. All the details. Regular people could use weeks just to produce one similar fugue after these perfect rules that Bach gouverned.
Then you meet this man next week. And he tells you he done the same thing AGAIN! And this time even better! There's no stopping Bach.
In the beginning of the 1700s, the rokokko period, Bach and his comrades were very late fashioned(Just SO last tuesday). So, however, this count or lord or whatever, invites Bach to have a little fun. His personal composer has created a small melody which this count asks Bach to make some music out of. The plan is that whenever Bach returns with whatever he made, they will look at it and laugh, play it and tease Bach.
Bach sees this, and he accepts, takes the melody, closes himself inside for a week, hardly eats, hardly sleeps, a little like Händel. And when he comes out, he returns to the Count with 'Die Musikalisches Opfer', 'The Musical Gift'. However, that work is so beautiful that noone could laugh. AND..
In that collection of pieces is (at least) one pice for two voices. Which requires 4 musicians. Because You put the score on the table, you put two musicians on one side, and two on the oposite side of the table. The all the musicians begin to play: The two on the correct side of the piece play the piece. The two others play the piece backwards. Then it's all one beautiful contrapunct. Is'nt THAT something!!