Compose a melody 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 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 G | G G G _B | A G !fermata!F G | E C/D/ E ^F | G A !fermata!G G | G G G _B | %6
 A G !fermata!F G | E C/D/ E ^F | G A !fermata!G G | c B A B | c/B/ A !fermata!G G | c G A E/F/ | %12
 G F !fermata!E E | D F E D | A, B, !fermata!C z |] %15
V:2
 z3 E | D/E/ F E D | C/ F E/ !fermata!C D | C C/B,/ C A, | D/C/4B,/4 C !fermata!B, E | D/E/ F E D | %6
 C/ F E/ !fermata!C D | C C/B,/ C A, | D/C/4B,/4 C !fermata!B, C/D/ | E/^F/ G F G | %10
 G D !fermata!D E | C/D/ E F C/D/ | E D !fermata!^C =C | B, A, G, G, | A, G, !fermata!G, z |] %15
V:3
 z3 C | D C/B,/ C F,/G,/ | A,/4_B,/4 C B,/ !fermata!A, G, | G,3/2 F,/ E, D, | %4
 D,/ G, ^F,/ !fermata!D, C | D C/B,/ C F,/G,/ | A,/4_B,/4 C B,/ !fermata!A, G, | G,3/2 F,/ E, D, | %8
 D,/ G, ^F,/ !fermata!D, E, | A, D, D D | G, ^F, !fermata!B, C | G, C C A, | %12
 _B, A, !fermata!A, G, | G, C C B,/G,/ | D,2 !fermata!E, z |] %15
V:4
 z3"C" C, |"G/B" B,,"Em7/B" G,,"C" C,"Bb/D" D,/E,/ |"F" F,"Csus4" C,"F" !fermata!F,,"G/B" =B,, | %3
"C" C,/D,/"C/E" E,"Am" A,,"D" D,/C,/ |"G/B" B,,/A,,/4G,,/4"D7" D,"G" !fermata!G,,"C" C, | %5
"G/B" B,,"Em7/B" G,,"C" C,"Bb/D" D,/E,/ |"F" F,"Csus4" C,"F" !fermata!F,,"G/B" =B,, | %7
"C" C,/D,/"C/E" E,"Am" A,,"D" D,/C,/ |"G/B" B,,/A,,/4G,,/4"D7" D,"G" !fermata!G,,"C" C, | %9
"Am" A,,"G/B" B,,/C,/"D" D,"G" G, |"C/E" E,/C,/"D" D,"G" !fermata!G,,"C" C, | %11
"C/E" E,"C" C,"F" F,/G,/"Am" A, |"C#dim7" ^C,"Dm" D,"A" !fermata!A,,"C" =C, | %13
"G" G,,"F/A" A,,/B,,/"C" C,"G" G,, |"D/F#" ^F,,"G" G,,"C" !fermata!C,, z |] %15  