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 
%%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
V:4 bass 
%%MIDI program 0
%%MIDI control 7 100
%%MIDI control 10 64
V:1
 z3 c | G A B c | d e !fermata!c e/f/ | g g e/f/ g | f2 !fermata!e e | f e d c/d/ | %6
 e e/d/ !fermata!c e/f/ | g g e g | f2 !fermata!e e | f e d c/d/ | e e !fermata!c d | e e A B | %12
 c/B/ A !fermata!G G | c d e d/e/ | f e d2 | !fermata!c3 z |] %16
V:2
 z3 G | G F F G | G G !fermata!A G | G/A/ B c _B | A =B !fermata!G G | G3/2 A/ B c/B/ | %6
 A ^G !fermata!A A | G d c e | e d !fermata!c c | c c B/A/ G | G G !fermata!A A/B/ | %11
 B/A/4B/4 c/B/ A3/2 G/ | G G/^F/ !fermata!D G | G G c c | B/ d c/ c B | !fermata!G3 z |] %16
V:3
 z3 E/D/ | C C D =E | F E !fermata!F E | D D C/D/ E | E D !fermata!C E | D E E E | %6
 E E !fermata!E C | D/E/ F/G/ G/A/ _B | A =B !fermata!G G | F G G G/F/ | E/D/ C !fermata!F F | %11
 E E3/2 D/ D/E/4F/4 | E/D/ C !fermata!B, B,/D/ | E D C A/G/ | F/G/ G A G/F/ | !fermata!E3 z |] %16
V:4
 z3"C" C,/D,/ |"C/E" E,"F7/Eb" _E,"Bdim/D" D,"C" C, |"G7/B" B,,"C" C,"F" !fermata!F,"C" C | %3
"G/B" B,/A,/"G" G,"Am" A,"Edim" E, |"F" F,"G7" G,"C" !fermata!C,"C" C | %5
"G7/B" B,"C" C"E7/G#" ^G,"Am" A,/B,/ |"Am/C" C/D/"E" E"Am" !fermata!A,"Am" A, | %7
"Gm/Bb" _B,"G7/B" =B,"C" C"C#dim7" ^C |"Dm" D"G7" G,"C" !fermata!C"C" C/B,/ | %9
"F/A" A,"C/G" G,"G7/F" F,"C/E" E,/D,/ |"C" C,/D,/"C/E" E,"F" !fermata!F,"Dm" D | %11
"C" C/B,/"Am" A,/G,/"F#m" ^F,"G" G, |"C" C,"D7" D,"G" !fermata!G,"G" G,/F,/ | %13
"C/E" E,/D,/"Csus2" C,/B,,/"Am" A,,/G,/"Dm7/F" F,/E,/ | %14
"Bdim/D" D,/B,,/"C" C,/E,/"Dm7/F" F,/D,/"G" G,/G,,/ |"C" !fermata!C,3 z |] %16  