Develop a melody that embodies the style and characteristics of Bach's pieces.  
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
L:1/8
V:4 bass 
%%MIDI program 0
%%MIDI control 7 100
%%MIDI control 10 64
L:1/8
V:1
 z3 A/B/ | c ^c d e | d ^c !fermata!d d | =c/B/ A/B/ c/d/ e | d/c/ d !fermata!c A/B/ | c ^c d e | %6
 d ^c !fermata!d d | =c/B/ A/B/ c/d/ e | d/c/ d !fermata!c d | e d/c/ B c | d/c/ B !fermata!A A | %11
 d ^c d e/d/ | c/B/ A !fermata!G G | c d e d/c/ | B/A/ B !fermata!A z |] %15
V:2
 z3 E | A A A A | F E !fermata!D A/B/ | =c/ C D/ E/F/ G/A/ | B/ c B/ !fermata!G E | A A A A | %6
 F E !fermata!D A/B/ | =c/ C D/ E/F/ G/A/ | B/ c B/ !fermata!G G/F/ | E/^F/ G/A/ D G | %10
 F B,/E/ !fermata!E E | A/_B/ A/G/ F E/^G/ | A/ E ^D/ !fermata!E E | E A ^G/E/ A | %14
 A ^G !fermata!E z |] %15
V:3
 z6 CD | E2 E2 F2 E2 | A, A2 G !fermata!F2 F2 | G2 A2 GF EC | G2 AG/F/ !fermata!E2 CD | %5
 E2 E2 F2 E2 | A, A2 G !fermata!F2 F2 | G2 A2 GF EC | G2 AG/F/ !fermata!E2 D2 | DC B,A, G,3 A, | %10
 B, A,2 ^G, !fermata!C2 ^C2 | D2 E2 A,B, CB, | A,B, CB, !fermata!B,2 C2 | CB, A,2 B,C/D/ E2 | %14
 E3 D !fermata!^C2 z2 |] %15
V:4
 z6"Am" A,,2 |"Am" A,_B,"A" A,G,"Dm/F" F,E,"Dsus2" D,^C, | %2
"Dm" D,F,"A" A,A,,"Dm" !fermata!D,2"Dm" D,2 |"C/E" E,2"F" F,2"C/E" E,D,"C" C,F, | %4
"G7/F" F,E,"Dm7/F" F,G,"C" !fermata!C,2"Am" A,,2 |"Am" A,_B,"A" A,G,"Dm/F" F,E,"Dsus2" D,^C, | %6
"Dm" D,F,"A" A,A,,"Dm" !fermata!D,2"Dm" D,2 |"C/E" E,2"F" F,2"C/E" E,D,"C" C,F, | %8
"G7/F" F,E,"Dm7/F" F,G,"C" !fermata!C,2"G/B" B,,2 |"D9" C,D,"Em7" E,^F,"G" G,=F,"C/E" E,2 | %10
"Bdim/D" D,2"Esus4" E,2"Am" !fermata!A,,2"A" A,=G, |"Dm/F" F,2"A/E" E,2"Dm" D,2"Am" A,,2 | %12
"Am" A,G,"F#m7b5" ^F,B,,"Em" !fermata!E,2"C" CB, |"Am" A,G,"Dm/F" F,E,"E7/D" D,C,"Am" B,,A,, | %14
"Esus4" E,4"A" !fermata!A,,2 z2 |] %15  