Create a composition emulating Bach's signature style.  
X:1
T:Music21 Fragment
T:Music21 Fragment
T:Music21
C:Music21
%%score 1 2 3 4
L:1/4
M:3/4
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 bass 
%%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
V:1
 C C C | F2 D | E2 ^F | !fermata!G3 | E F G | A2 F | G3 | !fermata!F3 | G E/F/ G | A2 G | %10
 G3/2 F/ E | !fermata!D3 | G G G | F2 E | E D2 | !fermata!C3 |] %16
V:2
 G, G, C | C B,/A,/ B, | C2 C | D3 | C C D/E/ | F2 F | F2 E | C3 | D C C | C2 C | D/C/ B, C | %11
 C !fermata!B,2 | C D/F/ E | D C/B,/ C | C2 B, | G,3 |] %16
V:3
 E, E, E, | D,/E,/ F, G, | G,2 A, | B,3 | G, A, _B, | C2 C | D/C/ _B,/A,/ G,/B,/ | %7
 _B,/A,/4G,/4 !fermata!A,2 | G, G, G, | G, F, E, | D, G, G, | G,3 | G, G, C/B,/ | A, G, G, | %14
 G, A, G,/F,/ | E,3 |] %16
V:4
"C" C,"C" C,/B,,/"Am" A,, |"Dm9" D,"Bdim/D" D,,"G" G,, |"C" C,"Cmaj7/B" B,,"F#dim/A" A,, | %3
"G" !fermata!G,,3 |"C" C,/_B,,/"F/A" A,,"Gm" G,, |"F" F,,"F/G" G,,"F/A" A,, | %6
"Gm7/Bb" _B,,"Gm" G,,"C" C, |"Fsus4" !fermata!F,,3 |"G/B" =B,,"C" C,"C/E" E,, | %9
"F" F,,/G,,/"F/A" A,,/B,,/"C" C, |"G/B" B,,"G" G,,"C" C, |"Gsus4" !fermata!G,,3 | %12
"C/E" E,"G/B" B,,"C" C, |"Dm" D,"G" G,,"C" C, |"C/E" E,,"Dm7/F" F,,"G" G,, |"C" !fermata!C,,3 |] %16  