Write a piece that resonates with the core elements of Bach's melodies.  
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 | c A/B/ c/d/ e | d/e/4f/4 d !fermata!c c | B A/B/ c d/c/ | B2 !fermata!A c | c A/B/ c/d/ e | %6
 d/e/4f/4 d !fermata!c c | B A/B/ c d/c/ | B2 !fermata!A d | e e B/c/ d | c c !fermata!B c | %11
 d A/B/ c B | A/4B/4c/ A !fermata!G c | B A/B/ c d/c/ | B2 !fermata!A z |] %15
V:2
 z3 E/F/ | G F G G | A G/F/ !fermata!E ^F | G =F E A | A ^G !fermata!E E/F/ | G F G G | %6
 A G/F/ !fermata!E ^F | G =F E A | A ^G !fermata!E =G | G G D/E/ F | E A !fermata!^G A | %11
 A/=G/ ^F E D/G/ | G/E/ ^F !fermata!D E | D/E/ ^F/=F/ E A | A ^G !fermata!E z |] %15
V:3
 z3 C | C C C C | C B, !fermata!G, A, | D D C/B,/ A, | F E/D/ !fermata!^C =C | C C C C | %6
 C B, !fermata!G, A, | D D C/B,/ A, | F E/D/ !fermata!^C B, | C G,/A,/ B, A,/B,/ | %10
 C/D/ E !fermata!E E | A, D G,/A,/ B,/D/ | E D/C/ !fermata!B, G,/A,/ | B,/C/ D C/B,/ A,/C/ | %14
 F/D/ B,/E/ !fermata!^C z |] %15
V:4
 z3"Am" A, |"C/E" E,"F" F,"C/E" E,/D,/"C" C, |"Dm7/F" F,"G" G,"C" !fermata!C,"F#dim/A" A, | %3
"G" G,"Dm" D"Am" A,/G,/"Dm/F" F,/E,/ |"Bm7b5/D" D,"E" E,"A" !fermata!A,,"Am" A, | %5
"C/E" E,"F" F,"C/E" E,/D,/"C" C, |"Dm7/F" F,"G" G,"C" !fermata!C,"F#dim/A" A, | %7
"G" G,"Dm" D"Am" A,/G,/"Dm/F" F,/E,/ |"Bm7b5/D" D,"E" E,"A" !fermata!A,,"G" G,, | %9
"C" C,/D,/"Em" E,/F,/"G" G,"Dm/F" F, |"Am" A,,/B,,/"Am/C" C,/D,/"E" !fermata!E,"Am" A,/G,/ | %11
"D/F#" ^F,/E,/"D" D,"C/E" E,/F,/"G" G, |"Am7/C" C,"D" D,"G" !fermata!G,,"C/E" E,/^F,/ | %13
"G" G,"D/F#" ^F,/^G,/"Am" A,/=G,/"Dm/F" =F,/E,/ |"Bm7b5/D" D,/B,,/"E" E,"A" !fermata!A,, z |] %15  