Create a composition that mimics the style of Bach's masterpieces.  
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 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
 z3 c | B A G F/E/ | A A !fermata!G c | B A G F/E/ | A A !fermata!G G | A B c/d/ e | %6
 d/c/ d !fermata!c c | B A G F/E/ | A A !fermata!G c | B A G F/E/ | A A !fermata!G G | A B c/d/ e | %12
 d/c/ d !fermata!c c | c d c A/B/ | c c !fermata!B B | c d c A/B/ | c c !fermata!B e | %17
 f/e/ d e/d/ c | c B !fermata!c B | c B A G | G ^F !fermata!G e | d c !fermata!B e | %22
 f/e/ d e/d/ c | c B !fermata!c c | c c d c | c B !fermata!c z |] %26
V:2
 z3 E | D/E/ F/E/ D C | C C !fermata!C E/^D/ | E/=D/ C/D/ E/D/ C/E/ | E ^D !fermata!E E/=D/ | %5
 C/A/ G/F/ E/F/ G/A/ | D/E/ F !fermata!E E | D/E/ F/E/ D C | C C !fermata!C E/^D/ | %9
 E/=D/ C/D/ E/D/ C/E/ | E ^D !fermata!E E/=D/ | C/A/ G/F/ E/F/ G/A/ | D/E/ F !fermata!E G | %13
 G/ F E/ E D | D D !fermata!D D | E F E D | C/D/ E !fermata!E E | D D G/F/ E | D D !fermata!E F | %19
 E D/E/ ^F E | E D !fermata!D c | ^G A !fermata!G B | A A/G/ G G | D E !fermata!E G | G F/E/ F E | %25
 D/C/ D !fermata!E z |] %26
V:3
 z3 G,/A,/ | B, C D/G,/ G, | G, F, !fermata!E, E,/^F,/ | G, A, B, C/B,/ | A, B, !fermata!B, C/B,/ | %5
 A,/F/ E/D/ C C | C B, !fermata!G, G,/A,/ | B, C D/G,/ G, | G, F, !fermata!E, E,/^F,/ | %9
 G, A, B, C/B,/ | A, B, !fermata!B, C/B,/ | A,/F/ E/D/ C C | C B, !fermata!G, E/D/ | %13
 C B, A,/B,/ C | ^F,/G,/ A, !fermata!G, G, | G, G, G, F, | E, A, !fermata!^G, A, | A, B, B, C/B,/ | %18
 A, G, !fermata!G, D | G,/A,/ B, C B, | A, A, !fermata!B, G,/A,/ | B, E, !fermata!E E/D/ | %22
 C D C C/B,/ | A, B, !fermata!A, C/_B,/ | A, A, A,/G,/ G, | G, G, !fermata!G, z |] %26
V:4
 z3"C" C, |"G" G,,"F/A" A,,"G/B" B,,"Csus4" C, |"F" F,,/G,,/"F/A" A,,/B,,/"C" !fermata!C,"Am" A,, | %3
"Em" E,"F" =F,"Em/G" G,"F/A" A,/G,/ |"F#m" ^F,"B" B,,"Em" !fermata!E, z | %5
"F" F,"Em/G" G,"Am" A,"C/G" G,/F,/ |"Gsus4" G,"G7" G,,"C" !fermata!C,"C" C, | %7
"G" G,,"F/A" A,,"G/B" B,,"Csus4" C, |"F" F,,/G,,/"F/A" A,,/B,,/"C" !fermata!C,"Am" A,, | %9
"Em" E,"F" =F,"Em/G" G,"F/A" A,/G,/ |"F#m" ^F,"B" B,,"Em" !fermata!E, z | %11
"F" F,"Em/G" G,"Am" A,"C/G" G,/F,/ |"Gsus4" G,"G7" G,,"C" !fermata!C,"C" C/B,/ | %13
"Am" A,"G#dim7" ^G,"Am" A,/=G,/"D7/F#" ^F,/E,/ | %14
"D" D,/E,/"D7/F#" ^F,/D,/"G" !fermata!G,"G" G,/=F,/ |"C/E" E,/D,/"G7/B" C,/B,,/"C" C,"Dm" D, | %16
"Am" A,,/B,,/"Am/C" C,/D,/"E" !fermata!E,"A/C#" ^C, |"Dm" D,"G" =G,/F,/"Em" E,"Am" A,/G,/ | %18
"D7/F#" ^F,"G" G,"C" !fermata!C,"Bdim/D" D, |"C/E" E,/^F,/"G" G,"D#dim7" ^D,"Em" E,/=D,/ | %20
"A7/C#" ^C,"D" D,"G" !fermata!G,,"C" =C, |"G#dim/B" B,,"Am" A,,"E" !fermata!E,"E/G#" ^G, | %22
"F/A" A,"Bm" B,"C" C"C/E" E, |"D7/F#" ^F,"E/G#" ^G,"Am" !fermata!A,"C/E" E, | %24
"F" =F,/=G,/"F/A" A,"Bm7b5" B,,"C" C, |"Gsus4" G,"G" G,,"C" !fermata!C, z |] %26  