Develop a melody that captures the spirit and nuances of Bach's well-known 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 A | ^G A/B/ c d | c B !fermata!A A | F G A G/F/ | E/D/ E !fermata!D A | ^G A/B/ c d | %6
 c B !fermata!A A | F G A G/F/ | E/D/ E !fermata!D z | D/E/ F G D/E/ | F G !fermata!A A | %11
 d ^c d e/d/ | =c B !fermata!A B | c A/_B/ c G | F E !fermata!D2 | A G F2 | E2 !fermata!D2 |] %17
V:2
 z3 F | E E E E | E E/D/ !fermata!^C E | D =C C/^C/ D | D ^C !fermata!A, F | E E E E | %6
 E E/D/ !fermata!^C E | D =C C/^C/ D | D ^C !fermata!A, z | A, D D3/2 ^C/ | D =C !fermata!C F/G/ | %11
 A G A E | E E/D/ !fermata!C D | E C F E | E/ D ^C/ !fermata!D2 | =C/D/ E3/2 ^C/ D | %16
 D ^C !fermata!A,2 |] %17
V:3
 z3 D/C/ | B, C/^G,/ A, B, | A, ^G, !fermata!E, A, | A,/_B,/ A,/G,/ F,/G,/ A, | %4
 _B, E,/G,/ !fermata!F, D/C/ | B, C/^G,/ A, B, | A, ^G, !fermata!E, A, | A,/_B,/ A,/G,/ F,/G,/ A, | %8
 _B, E,/G,/ !fermata!F, z | F,/G,/ A, G,/A,/ _B, | A, G, !fermata!F, C | F E D/=C/ B, | %12
 A, ^G, !fermata!E, F, | G, F, F, C/_B,/ | A, G, !fermata!F,2 | F, E,/A,/ A, _B, | %16
 _B, A,/G,/ !fermata!^F,2 |] %17
V:4
 z3"Dm" D, |"E" E,/D,/"Am/C" C,/B,,/"Am" A,,"E7/G#" ^G,, | %2
"Am" A,,"E" E,,"A" !fermata!A,,"A/C#" ^C, |"Dm" D,"Am7/E" E,"F" F,/E,/"Dsus4" D, | %4
"Em7b5/G" G,,/A,,/4_B,,/4"A" A,,"Dm" !fermata!D,,"Dm" D, | %5
"E" E,/D,/"Am/C" C,/B,,/"Am" A,,"E7/G#" ^G,, |"Am" A,,"E" E,,"A" !fermata!A,,"A/C#" ^C, | %7
"Dm" D,"Am7/E" E,"F" F,/E,/"Dsus4" D, |"Em7b5/G" G,,/A,,/4_B,,/4"A" A,,"Dm" !fermata!D,, z | %9
"Dm" D,3/2 C,/"Gm/Bb" _B,,/A,,/"Gm" G,, |"Dm" D,"C/E" E,"F" !fermata!F,"F" F,/E,/ | %11
"Dm" D,"C#dim/E" E,"D/F#" ^F,"E/G#" ^G, |"Am" A,"E" E,"Am" !fermata!A,,"Bdim/D" D, | %13
"C" C,"F" F,"F/A" A,,/_B,,/"C" C, |"Dm" D,"A7" A,,"Bb" !fermata!_B,,2 | %15
"F" F,"C#dim" ^C,"Dm" D,"Bb" _B,, |"Em7b5/G" G,,"A" A,,"D" !fermata!D,,2 |] %17  