Write a composition that represents the stylistic elements of Bach's music.  
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
V:1
 z3 e | c d e/f/ g | f2 !fermata!e e/f/ | g g d e | c2 !fermata!B G | c d e e/d/ | !fermata!d3 e | %7
 c d e/f/ g | f2 !fermata!e e | g g d e | c2 !fermata!B G | c d e f | e/d/ d !fermata!c z |] %13
V:2
 z3 G | F F E/D/ C | c G !fermata!G A | G/F/ G/A/ B B | A2 !fermata!D D | G A/B/ c G | %6
 !fermata!G3 B | A G G A | A ^G !fermata!A A | G G G G | G ^F !fermata!G B | A G G c/B/ | %12
 c B !fermata!G z |] %13
V:3
 z3 C | A, B, C/D/ E | E D !fermata!C C | C C G G | G ^F !fermata!G B, | C F G/B,/ C | %6
 !fermata!B,3 E | E D C/D/ E | D/^C/ B, !fermata!C =C | B,/A,/ B,/C/ D C/D/ | E D !fermata!D E | %11
 E D C C/D/ | E/C/ G/F/ !fermata!E z |] %13
V:4
 z3"C" C, |"F" F,/E,/"Bdim/D" D,"C" C,"C" C/B,/ |"Fmaj7/A" A,"G7/B" B,"C" !fermata!C"Am" A, | %3
"C/E" E,/D,/"C/E" E,/F,/"G" G,"Em" E, |"F#dim/A" A,2"G" !fermata!G,"G7/F" =F, | %5
"C/E" E,"Dm" D,"C" C,/D,/"C/E" E,/F,/ |"G" !fermata!G,3"E/G#" ^G, |"Am" A,"G/B" B,"C" C"A7/C#" ^C | %8
"Dm" D"G#dim7/D" D,"A" !fermata!A,"Am" A, |"Em/B" E"G/B" D/C/"G/B" B,"C" C/B,/ | %10
"Am7" A,"D" D"G" !fermata!G,"Em" E, |"Am" A,"G/B" B,"C" C/B,/"F/A" A, | %12
"C/G" G,/F,/"G" G,"C" !fermata!C, z |] %13  