Craft a tuneful harmony that embodies the unique qualities of Bach's most renowned 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 nm="Piano" snm="Pno"
%%MIDI program 0
%%MIDI control 7 100
%%MIDI control 10 64
V:2 treble nm="Piano" snm="Pno"
%%MIDI channel 3
%%MIDI program 0
%%MIDI control 7 100
%%MIDI control 10 64
V:3 bass nm="Piano" snm="Pno"
%%MIDI channel 4
%%MIDI program 0
%%MIDI control 7 100
%%MIDI control 10 64
V:4 bass nm="Piano" snm="Pno"
%%MIDI channel 5
%%MIDI program 0
%%MIDI control 7 100
%%MIDI control 10 64
V:1
 z3 c | G A/B/ c/d/ e | d c2 B | !fermata!c2 z e | d c B/A/ G | A B/c/ d2 | d c B2 | %7
 !fermata!A2 z c | G A/B/ c/d/ e | d c2 B | !fermata!c2 z e | d c B/A/ G | A B/c/ d2 | d c B2 | %14
 !fermata!A2 z e | f d e c | d e !fermata!A e | f d e c | d e !fermata!A2 | z3 c | B A G A | %21
 F F E z | z A G c | c B !fermata!c z | z G A B | c/d/ e2 d | d c B B | !fermata!A2 z2 |] %28
V:2
 z3 E/F/ | G F G ^G/A/ | B E D D | !fermata!E2 z G | G/F/ E F E | F3 E/^F/ | ^G A/=G/ F E/D/ | %7
 !fermata!C2 z E/F/ | G F G ^G/A/ | B E D D | !fermata!E2 z G | G/F/ E F E | F3 E/^F/ | %13
 ^G A/=G/ F E/D/ | !fermata!C2 z A | A G G F | F E !fermata!E A | A G G F/E/ | D G !fermata!F2 | %19
 z3 E | ^D E/^F/ B, E | E D ^C z | z C2 G | G F !fermata!E z | z E D D | C c/B/ A/^G/ A/B/ | %26
 ^G A/=G/ F E/D/ | !fermata!^C2 z2 |] %28
V:3
 z3 G, | C C C C | B, C/B,/ A, G, | !fermata!G,2 z C | B, C D/C/ B, | C D ^G,/A,/ B, | B, A,2 ^G, | %7
 !fermata!A,2 z G, | C C C C | B, C/B,/ A, G, | !fermata!G,2 z C | B, C D/C/ B, | C D ^G,/A,/ B, | %13
 B, A,2 ^G, | !fermata!A,2 z C | C/A,/ B, B,/G,/ A, | A, B, !fermata!C E | D D C C/B,/ | %18
 A, A, !fermata!A,2 | z3 A, | A,/ G, ^F,/ E, E, | F,/G,/ A,/B,/ ^C z | z A,/B,/4=C/4 B, C/D/ | %23
 E D !fermata!C z | z C ^F, ^G, | A,/B,/ C2 B, | B, A,2 ^G, | !fermata!A,2 z2 |] %28
V:4
 z3"C" C,/D,/ |"C/E" E,"F" F,"C/E" E,3/2 ^F,/ |"G#dim" ^G,"Am" A,/=G,/"D7/F#" ^F,"G" G, | %3
"C" !fermata!C,2 z"C" C |"G" G,"Am" A,"Bdim/D" D,"Em" E, | %5
"Fmaj7/E" E,"Bdim/D" D,/C,/"G#dim7/B" B,,/A,,/"E7/G#" ^G,,/B,,/ | %6
"E7" E,"F" F,/E,/"Bm7b5/D" D,"E" E, |"Am" !fermata!A,,2 z"C" C,/D,/ | %8
"C/E" E,"F" F,"C/E" E,3/2 ^F,/ |"G#dim" ^G,"Am" A,/=G,/"D7/F#" ^F,"G" G, |"C" !fermata!C,2 z"C" C | %11
"G" G,"Am" A,"Bdim/D" D,"Em" E, |"Fmaj7/E" E,"Bdim/D" D,/C,/"G#dim7/B" B,,/A,,/"E7/G#" ^G,,/B,,/ | %13
"E7" E,"F" F,/E,/"Bm7b5/D" D,"E" E, |"Am" !fermata!A,,2 z"Am" A, | %15
"Dm7" D,"G" G,"Cmaj7" C,"F" F,/E,/ |"Dm" D,"E/G#" ^G,,"Am" !fermata!A,,"Am/C" C | %17
"Dm7/C" C"G/B" B,"Cmaj7/B" B,"F/A" A,/G,/ |"Dm/F" F,/E,/"A7/C#" D,/^C,/"Dm" !fermata!D,2 | %19
 z3"Am" A,, |"B" B,,"A7/C#" ^C,/^D,/"Em" E,"A/C#" C, |"Dm" D,/E,/"Dm/F" F,/G,/"A" !fermata!A, z | %22
 z"F" F,2"C/E" E,/F,/ |"C/G" G,"G7" G,,"C" !fermata!C, z | z"C" C,"D7/F#" C"G#dim" B, | %25
"Am" A,3/2 =G,/"Fmaj7" F,/E,/"Bm7b5/F" F,/D,/ |"E7" E,"F" F,/E,/"Bm7b5/D" D,"E" E, | %27
"A" !fermata!A,,2 z2 |] %28  