Develop a tune influenced by Bach's compositions.  
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 A | A A ^G E | A B c c | d c !fermata!B B | c d e/d/ c | f f e _e/d/ | d2 !fermata!c c | %7
 B A G E/=F/ | G G A G | F2 !fermata!E e | d c/B/ B2 | !fermata!A3 z |] %12
V:2
 z3 E | F/E/ D E B, | E/^F/ ^G A A | B A !fermata!^G G | A B c G | A/B/ c c c | %6
 c B !fermata!G A/G/ | F/E/ ^F E B, | E/F/ G G/F/ F/E/ | E/D/4C/4 D !fermata!C c | B A A ^G | %11
 !fermata!E3 z |] %12
V:3
 z3 C | C B,/A,/ B, ^G, | A, D E E | F E !fermata!E E | E F G/F/ E/D/ | C C/D/ E/C/ A | %6
 G3/2 =F/ !fermata!E E | D C B, G, | C C C B, | C G, !fermata!G, G | F E ^F E/=D/ | %11
 !fermata!^C3 z |] %12
V:4
 z3"Am" A, |"Dm7" D,/E,/"Bm7b5/F" F,"E" E,"E7/D" D, |"Am/C" C,"G#dim/B" B,,"Am" A,,"Am" A, | %3
"G#dim7" ^G,"Am" A,"E" !fermata!E,"E" E, |"Am" A,"Bdim/D" D"C" C"C7/Bb" _B, | %5
"F/A" A,"Fm/Ab" _A,"C/G" G,"F#dim7" ^F, |"Gsus4" G,2"C" !fermata!C,"Am" A,, | %7
"Bdim/D" D,"D#dim7" ^D,"Em" E,3/2 =D,/ |"C" C,/D,/"C/E" E,/C,/"F" F,"G" G,/G,,/ | %9
"Fmaj7/A" A,,"G7/B" B,,"C" !fermata!C,"C" C, |"G#dim7" ^G,,/^G,/"Am" A,"B7/D#" ^D,"E" E, | %11
"A" !fermata!A,,3 z |] %12  