Compose a musical piece with Bach's style as your main influence.  
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
L:1/8
V:1
 A3/2 d/ ^c d | e f/e/ !fermata!e2 | f d g f | e e/>f/ d !fermata!d | A A d c | %5
 _B A/G/ !fermata!G2 | c A d/e/ f | A G/F/ F !fermata!F | A3/2 =B/ ^c c | d e ^c !fermata!c | %10
 d e f d | g f e !fermata!e | d A _B A | A3/2 G/ !fermata!A2 | d A _B/A/ G/F/4E/4 | %15
 F E/D/ !fermata!D2 |] %16
V:2
 F A G A | A A !fermata!A2 | A A G/A/ _B | _B/E/ A/G/ F !fermata!F | F/G/ A D/E/ F | %5
 G F !fermata!E2 | G3/2 F/ F/G/ A/G/ | F E C !fermata!C | F F G A | A _B A !fermata!A | A A A A | %11
 G A A !fermata!A | A A A/ G F/ | F/E/ D !fermata!E2 | A/G/ A/F/ G D | D ^C !fermata!A,2 |] %16
V:3
 D D E F | E D D !fermata!^C | D F/E/ D D | D ^C A, !fermata!A, | D E F C | C C !fermata!C2 | %6
 C C D/ C D/ | C C/>_B,/ A, !fermata!A, | C D/F/ E E | F G E !fermata!E | F E D/E/ F/E/ | %11
 D D D !fermata!^C | D F D ^C | D/^C/ D !fermata!C2 | D D D _B, | A, A,/>G,/ !fermata!^F,2 |] %16
V:4
"Dm" D,2"Dm/F" F,2"C#dim/E" E,2"Dm" D,2 |"A/C#" ^C,2"Dm" D,2"Asus4" !fermata!A,,4 | %2
"Dm" D,2"Dm" D=C"Gm/Bb" _B,3 A, |"Em7b5/G" G,2"A" A,2"Dm" !fermata!D,4 | %4
"Dm" D2"Am/C" C2"Bb" _B,2"F/A" A,G, |"C7/E" F,E,"F" F,2"C" !fermata!C,4 | %6
"C/E" E,C,"F" F,2"Bb" _B,,2"F/A" A,,B,, |"F/C" C,_B,,"C" C,2"F" !fermata!F,,4 | %8
"F" F,E,"Dm/F" F,D,"C#dim/E" E,_B,"A" A,G, |"Dm/F" F,D,"Edim/G" G,,G,"A" A,A,,"A" !fermata!A,G, | %10
"Dm/F" F,E,"Dsus2" D,^C,"Dm" D,A,"Dm" D=C |"Gm/Bb" _B,2"Dm/A" A,G,"Asus4" A,2"A" !fermata!A,,2 | %12
"Dm/F" F,2"Dm" D,2"Gm" G,2"A" A,2 |"Bbmaj7" _B,4"A" !fermata!A,4 | %14
"Dm/F" F,E,"Dm/F" F,D,"Gm" G,A,"Gm/Bb" _B,G, |"Dm/A" A,2"A" A,,2"D" !fermata!D,4 |] %16  