Arrange a melody that reflects the style of Bach's works.  
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
 z3 c | c A/B/ c/d/ e | d d !fermata!c c | B A/B/ c d/c/ | B2 !fermata!A c | c A/B/ c/d/ e | %6
 d d !fermata!c c | B A/B/ c d/c/ | B2 !fermata!A d | e e B/c/ d | c c !fermata!B c | d A/B/ c B | %12
 A A !fermata!G c | B A/B/ c d/c/ | B2 !fermata!A z |] %15
V:2
 z3 A | G F E E | F F/4E/4F/ !fermata!E E | E/d/ c/B/ A A/G/ | F E/D/ !fermata!C A | G F E E | %6
 F F/4E/4F/ !fermata!E E | E/d/ c/B/ A A/G/ | F E/D/ !fermata!C G | G G D3/2 B/ | %10
 B/A/4^G/4 A !fermata!G A | A/G/ F E/^F/ G | G ^F !fermata!D E | D/E/ ^F/^G/ A A | %14
 A ^G !fermata!E z |] %15
V:3
 z3 E | E/D/ C C G, | A, B, !fermata!G, A, | ^G,/=F/ E/D/ C/B,/ A, | A, ^G, !fermata!A, E | %5
 E/D/ C C G, | A, B, !fermata!G, A, | ^G,/=F/ E/D/ C/B,/ A, | A, ^G, !fermata!A, =G, | %9
 C C G ^G/B,/ | C/D/ E !fermata!E E | A, D C D | D/A,/ D/C/ !fermata!B, G,/A,/ | B,/C/ D E D/E/ | %14
 F/B,/ E/D/ !fermata!^C z |] %15
V:4
 z6"Am" A,2 |"C/E" E,2"F" F,G,"Am" A,B,"C/G" C2 |"Dm/F" F,2"G7" G,2"C" !fermata!C,2"Am" A,,2 | %3
"E" E,2"F#m7b5" ^F,^G,"Am" A,=G,"Dm/F" =F,E, |"Bm7b5/D" D,2"E" E,2"Am" !fermata!A,,2"Am" A,2 | %5
"C/E" E,2"F" F,G,"Am" A,B,"C/G" C2 |"Dm/F" F,2"G7" G,2"C" !fermata!C,2"Am" A,,2 | %7
"E" E,2"F#m7b5" ^F,^G,"Am" A,=G,"Dm/F" =F,E, |"Bm7b5/D" D,2"E" E,2"Am" !fermata!A,,2"G/B" B,,2 | %9
"C" C,D,"C/E" E,F,"G" G,A,"G#dim/B" B,^G, |"Am" A,B,"Am/C" CD"E" !fermata!E2"Am" A,G, | %11
"Dm/F" F,E,"Dm" D,2"Am" A,,2"G/B" B,,C, |"Dsus4" D,C,"D" D,2"G" !fermata!G,,2"C/E" E,^F, | %13
"G" G,2"D" D,2"Am" A,G,"Dm/F" F,E, |"Bm7b5/D" D,2"E" E,2"A" !fermata!A,,2 z2 |] %15  