Develop a tune that resonates with the style of Bach's masterpieces.  
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 c | c c d c | f g !fermata!f2 | e/f/ g a g/f/ | e d !fermata!c c | f e/f/ g d | %6
 c/B/ A !fermata!G G | d d d e | f/e/ d c/d/ e | !fermata!d2 c c | c2 !fermata!c z |] %11
V:2
 z3 G | A G/A/ B A | c c/_B/ !fermata!A2 | c/d/ e f/e/ d | c B !fermata!G G/A/ | B c c B/A/ | %6
 G/E/ ^F !fermata!D D | G ^F/D/ B c | d/ c B/ A/d/ G/A/ | !fermata!B2 G/A/ _B | A A !fermata!G z |] %11
V:3
 z6 E2 | F2 E2 DG E2 | AF E2 !fermata!C4 | A2 _B2 c2 G2 | G2 GF !fermata!E2 C2 | D2 GF EC G2 | %6
 G2 DC !fermata!B,2 B,C | DE ^FA G2 G2 | AG AG GF EF | !fermata!G4 G2 E2 | C2 F2 !fermata!E2 z2 |] %11
V:4
 z6"C" CB, |"F/A" A,B,"C" C2"G" G,2"Am" A,G, |"F" F,2"C" C,2"F" !fermata!F,4 | %3
"Am" A,2"Edim/G" G,2"F" F,2"G/B" B,,2 |"C" C,E,"G" G,2"C" !fermata!C,2"C/E" E,2 | %5
"Bdim/D" D,2"C" C,D,"C/E" E,F,"G" G,F, |"C/E" E,C,"D" D,2"G" !fermata!G,2"G" G,A, | %7
"G/B" B,C"D" D^F,"G" G,=F,"C/E" E,2 |"Dm" D,E,"Dm7/F" F,G,"Am" A,B,"C" CC, | %9
"G" !fermata!G,4"C/E" E,D,"C" C,2 |"F" F,2"F" F,2"C" !fermata!C,2 z2 |] %11  