Create a tune that captures the spirit of Bach's compositions.  
X:1
T:Music21 Fragment
T:Music21 Fragment
T:Music21
C:Music21
%%score 1 2 3 4
L:1/4
M:4/4
K:C
V:1 treble 
%%MIDI program 0
%%MIDI control 7 100
%%MIDI control 10 64
V:2 treble 
%%MIDI program 0
%%MIDI control 7 100
%%MIDI control 10 64
V:3 treble 
%%MIDI program 0
%%MIDI control 7 100
%%MIDI control 10 64
V:4 bass 
%%MIDI program 0
%%MIDI control 7 100
%%MIDI control 10 64
L:1/8
V:1
 e d/c/ d g | e c !fermata!d2 | c c c c | d e d2 | !fermata!c4 | e d/c/ d g | e c !fermata!d2 | %7
 c c c c | d e d2 | !fermata!c4 | G G A B | c d B !fermata!G | c c c c | d e d2 | !fermata!c4 |] %15
V:2
 G G G B | G G/A/ !fermata!B2 | A _B A G | A/=B/ c c B | !fermata!G4 | G G G B | %6
 G G/A/ !fermata!B2 | A _B A G | A/=B/ c c B | !fermata!G4 | E D E/^F/ G | A A G !fermata!D | %12
 G/E/ F/G/ A A | A/B/ c c B | !fermata!G4 |] %15
V:3
 C/D/ E D D | E/F/ G !fermata!G2 | E E F C | F G A/F/ D/G/4F/4 | !fermata!E4 | C/D/ E D D | %6
 E/F/ G !fermata!G2 | E E F C | F G A/F/ D/G/4F/4 | !fermata!E4 | C D C D | E D D !fermata!B, | %12
 C3/2 _B,/ A,/=B,/ C/D/4E/4 | F G G3/2 F/ | !fermata!E4 |] %15
V:4
"C" C,2"C" C2"Csus2" CB,"G/A" A,G, |"C" CD"C/E" EC"G" !fermata!G,4 |"Am" A,, A,2 G,"F" F,, F,2 E, | %3
"Dm" D,2"C" C,E,"Dm7/F" F,D,"G" G,2 |"C" !fermata!C,8 |"C" C,2"C" C2"Csus2" CB,"G/A" A,G, | %6
"C" CD"C/E" EC"G" !fermata!G,4 |"Am" A,, A,2 G,"F" F,, F,2 E, | %8
"Dm" D,2"C" C,E,"Dm7/F" F,D,"G" G,2 |"C" !fermata!C,8 |"C" C, C2 B,"Am" A,2"G" G,2 | %11
"Am7/G" G,2"D/F#" ^F,2"G" G,2"G" !fermata!G,2 |"C/E" E,C,"Dm" D,E,"F" F,G,"F" F,E, | %13
"Dm" D,2"C" C,E,"Gsus4" G,4 |"C" !fermata!C,8 |] %15  