Compose a music piece with Bach's influence in mind.  
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
 A A c c | d d e !fermata!e | e g f e | d3/2 d/ !fermata!c2 | d d e c | B3/2 B/ !fermata!A2 | %6
 a a g g | ^f f e !fermata!e | g g =f e | d3/2 d/ !fermata!c2 | d d e c | B3/2 B/ !fermata!A2 |] %12
V:2
 E E A A | A d/B/ c !fermata!c | c c c/B/ c | c B !fermata!G2 | B A ^G/B/ E/A/4G/4 | %5
 A ^G !fermata!E2 | c c B B | c B B !fermata!B | B c c/ d c/ | c B !fermata!G2 | A B B3/2 A/ | %11
 A ^G !fermata!E2 |] %12
V:3
 C2 C2 E2 E2 | F2 G2 G2 !fermata!G2 | G2 GE FG G2 | AF DG/F/ !fermata!E4 | G2 D3 C/B,/ CF | %5
 FD B,E/D/ !fermata!C4 | E2 E2 E2 E2 | E3 ^D G2 !fermata!G2 | GF E2 A G2 A | AF DG/F/ !fermata!E4 | %10
 ^F2 G=F E2 EF | FD B,E/D/ !fermata!^C4 |] %12
V:4
"Am" A,B,"Am/C" CB,"Am" A,G,"Fmaj7" F,E, |"Dm" D,C,"G/B" B,,G,,"C" C,2"C" !fermata!C2 | %2
"C" C,D,"C/E" E,A,"Dm" D,G,"C" C,E, |"Dm7/F" F,D,"G" G,2"C" !fermata!C,4 | %4
"G/B" B,A,"Gsus2" G,F,"E" E,^G,"Am" A,F, |"Bm7b5/D" D,B,,"E" E,2"Am" !fermata!A,,4 | %6
"Am" A,,B,,"Am/C" C,D,"Em" E,^F,"Em/G" G,E, |"F#m7b5/A" A,^F,"Bsus4" B,2"Em" !fermata!E,4 | %8
"Em" ED"C" CB,"F/A" A,B,"C" CA, |"Dm7/F" F,D,"G" G,2"C" !fermata!C,4 | %10
"D7/C" C2"G/B" B,A,"E/G#" ^G,2"Am" A,F, |"Bm7b5/D" D,B,,"E" E,2"A" !fermata!A,,4 |] %12  