Develop a musical work that captures the 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 treble 
%%MIDI program 0
%%MIDI control 7 100
%%MIDI control 10 64
L:1/8
V:4 bass 
%%MIDI program 0
%%MIDI control 7 100
%%MIDI control 10 64
L:1/8
V:1
 z3 A | A/B/ c B e | d c !fermata!B c/B/ | A e d e | A/B/ ^c !fermata!d =c | B e e/d/ c | %6
 !fermata!B3 A/B/ | c c d d | e e/d/ !fermata!c e | d c B A/B/ | c B !fermata!A z |] %11
V:2
 z3 E | E E E3/2 ^F/ | ^G A !fermata!G A/G/ | A A A G | G/F/ E !fermata!F E | E E/B/ c/ B A/ | %6
 !fermata!^G3 E | E F/G/ A/F/ G | G G !fermata!A G/A/ | B A ^G A | A/^F/ ^G !fermata!E z |] %11
V:3
 z6 C2 | CB, A,2 ^G,2 A,2 | B,2 CD !fermata!E2 ED | CB, ^C2 D=C _B,A, | A,2 A,2 !fermata!A,2 A,2 | %5
 ^G,2 A,G, A,B, CD | !fermata!E6 CB, | A,2 A,2 A,B,/C/ B,2 | C2 C2 !fermata!C2 C2 | FE E2 D2 CF | %10
 EA, B,D !fermata!^C2 z2 |] %11
V:4
 z6"Am" A,,2 |"Am" A,^G,"Am" A,2"E" E,D,"Am/C" C,2 | %2
"G#dim/B" B,,2"Am" A,,2"E" !fermata!E,2"Am" A,,2 |"Am" A,2"A" A,G,"Dm/F" F,E,"Em7b5/D" D,^C, | %4
"Dsus4" D,2"A" A,,2"Dm" !fermata!D,,2"Am" A,,2 |"E" E,D,"Am/C" C,E,"F#m7b5" ^F,^G,"Am" A,2 | %6
"E" !fermata!E,6"Am" A,,2 |"Am" A,G,"F" F,E,"Dm/F" F,E,"G" G,F, | %8
"C/E" E,D,"C" C,2"F" !fermata!F,2"C" C,B,, | %9
"Bm7b5/A" A,,^G,,"Am" A,,=G,,"G#dim7/F" F,,E,,"F" F,,D,, |"F#m7b5/E" E,,4"A" !fermata!A,,2 z2 |] %11  