Compose a piece that reflects the style and essence 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 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 E | E C D E | C B, !fermata!A, E | E D G E | C D !fermata!E E | G A/B/ c B | %6
 A ^G !fermata!A A | B A G ^F | E ^F !fermata!E A | G ^F G E | E D !fermata!C E | F E/D/ C D | %12
 C B, !fermata!A, z |] %13
V:2
 z3 C | B, A, A, A, | A, ^G, !fermata!E, C | C D/C/ B, C | A, A, !fermata!^G, A, | B, D E D | %6
 C/D/ E !fermata!E D | D ^C/^D/ E B, | B,/E/ E/^D/ !fermata!B, A, | B, C D C | %10
 C B, !fermata!G, A, | A, ^G, A, B, | ^G,/ A, G,/ !fermata!E, z |] %13
V:3
 z3 A, | E, E, F, E, | F, B,, !fermata!C, A, | G, G, G, G, | F, A,, !fermata!B,, C, | %5
 E, F, G, F,/G,/ | A, B, !fermata!C ^F, | G,/^F,/ E, A, A, | G, A, !fermata!G, D, | D, A, G, G, | %10
 A, D, !fermata!E, E, | D,/C,/ B,, F,2 | F,/E,/ D,/E,/ !fermata!^C, z |] %13
V:4
 z3"Am" A,, |"E/G#" ^G,,"Am" A,,"Dm/F" F,"Am/C" C, | %2
"Dm7" D,"E/B" E,"Am" !fermata!A,,"Am" A,,/B,,/ |"C" C,"G/B" B,,"Em" E,"C" C, | %4
"F" F,"Dm/F" F,,"E" !fermata!E,,"Am" A,, |"Em" E,"Dm" D,"C" C,"Bdim/D" D,/E,/ | %6
"F" F,"E" E,"Am" !fermata!A,,"D" D, |"G" G,,"A" A,,/B,,/"A7/C#" ^C,"B7/D#" ^D, | %8
"Em" E,"B7" B,,"Em" !fermata!E,,"D/F#" ^F,, |"G" G,,"F#dim/A" A,,"G/B" B,,"C" C, | %10
"Fmaj7" F,,"G" G,,"C" !fermata!C,,"A/C#" ^C,, |"Dm" D,,"E" E,,"F" F,,"Bdim/E" E,,/D,,/ | %12
"C+/E" E,,"Em" E,,"A" !fermata!A,, z |] %13  