Write a song that has the characteristics of Bach's musical 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/B/ c B e | d c !fermata!B c/B/ | A e d e | A/B/ ^c !fermata!d =c | B e d c | %6
 !fermata!B3 A/B/ | c c d d | e e !fermata!c e | d c B A/B/ | c B !fermata!A z |] %11
V:2
 z3 E | E3/2 A/ A/^G/ =G | F ^F !fermata!B, E | F G G G | F E !fermata!F E | E E/^F/ ^G A | %6
 !fermata!^G3 A/G/ | A A/=G/ F _B | _B A/G/ !fermata!A c | B A/G/ ^F/^G/ A | A ^G !fermata!E z |] %11
V:3
 z3 C/D/ | E A, B, _B, | A, A, !fermata!^G, A, | A, C C/B,/4A,/4 B,/^C/ | D A, !fermata!A, A, | %5
 ^G, A, B, C/D/ | !fermata!E3 E/D/ | C _E D G | G F/E/ !fermata!F G | G/F/ E D C/D/ | %10
 E3/2 D/ !fermata!^C z |] %11
V:4
 z3"Am" A,/B,/ |"Am/C" C"Am" A,"Esus4" E,"C#dim7" ^C, |"Dm" D,"D#dim7" ^D,"E" !fermata!E,"Am" A,, | %3
"Dm" D,"C" C,"Gsus4" G,"Em" E, |"Dm/F" F,/G,/"A" A,"Dm" !fermata!D,"Am" A, | %5
"E" E,"Am/C" C,"G#dim/B" B,,"Am" A,, |"E" !fermata!E,3"Am/C" C/B,/ | %7
"Am" A,/G,/"F7" F,"Bb" _B,/A,/"Gm" G, |"C7" C"Fmaj7/C" C,"F" !fermata!F,"C" C | %9
"G" G,"Am" A,"Bm/D" D,/E,/"F" F, |"Am/C" C,/D,/"E" E,"A" !fermata!A,, z |] %11  