Develop a melodic score that embodies the essence of Bach.  
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 bass 
%%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
L:1/8
V:1
 z3 D | D D ^C F | E D !fermata!^C C | ^C C D B, | ^C C !fermata!D E | E G E C | D E !fermata!F F | %7
 E D !fermata!^C C | ^C C D B, | ^C C !fermata!D z |] %10
V:2
 z3 A, | A, A,/^G,/ A, D/=C/ | _B,/A,/ =B, !fermata!A, A, | G, A, A, G, | %4
 G,/_B,/ A, !fermata!A, =C | C D C C | _B,/A,/ G,/B,/ !fermata!A, D | D/^C/ D/G,/ !fermata!A, A, | %8
 G,/A,/ _B,/A,/ A, =B, | A, A, !fermata!A, z |] %10
V:3
 z3 F, | F,/E,/ D, E, A, | G, F,/E,/ !fermata!E, E, | E, E, D, D, | %4
 E,/G,/ G,/F,/4E,/4 !fermata!F, G, | G, G, G, F, | F, E,/G,/ !fermata!F, A, | %7
 A,3/2 D,/ !fermata!E, E, | E, E, D, D,/4E,/4=F,/ | E,/D,/ E,/4F,/4=G,/ G,/!fermata!^F,/ z |] %10
V:4
 z6"Dm" D,2 |"Dm" D,C,"Bb" _B,,2"A" A,,=G,,"Dm/F" F,,D,, | %2
"Edim/G" G,,2"G#dim7" ^G,,2"A" !fermata!A,,2"A" A,,_B,, | %3
"C#dim7/Bb" _B,,A,,"A" A,,G,,"Gsus2" G,,^F,,"G" G,,=F,, | %4
"C#dim/E" E,,2"A" A,,2"Dm" !fermata!D,,2"C" C,2 |"C" C,D,"Csus2" C,=B,,"C" C,_B,,"Bbsus2" B,,A,, | %6
"Bb" _B,,=B,,"C" C,^C,"Dm" !fermata!D,2"Dm" D,,2 |"Asus4" A,,2"Bb" _B,,2"A" !fermata!A,,2"A" A,,2 | %8
"C#dim/E" E,,F,,"C#dim7/G" G,,2"Dm/F" F,,^F,,"G" G,,^G,, | %9
"A" A,,2"A" A,,,2"Dsus4" !fermata!D,,2 z2 |] %10  