Compose a piece of music that demonstrates the impact of Bach's work.  
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/B/ A/B/ c/d/ e | d d !fermata!c c | B A/B/ c d | B2 !fermata!A c | c/B/ A/B/ c/d/ e | %6
 d d !fermata!c c | B A/B/ c d | 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/D/ C | D/E/ F !fermata!E ^F | G ^F/^G/ A A/=G/ | F E/D/ !fermata!C A | G F E/D/ C | %6
 D/E/ F !fermata!E ^F | G ^F/^G/ A A/=G/ | F E/D/ !fermata!C G | G G D3/2 E/ | %10
 ^F/^G/ A !fermata!G A | A/G/ ^F E D/E/ | =F F !fermata!E A | G A ^G/B/ A/=G/ | %14
 F E/D/ !fermata!^C z |] %15
V:3
 z3 E | E/D/ C C/B,/ A,/G,/ | A, B, !fermata!C C | D D E A, | A, ^G, !fermata!A, E | %5
 E/D/ C C/B,/ A,/G,/ | A, B, !fermata!C C | D D E A, | A, ^G, !fermata!A, =G, | %9
 C G,/A,/ B, A,/B,/ | C/D/ E !fermata!E E | D D G,/A,/ B, | C/B,/ C/D/ !fermata!E _E | D D E A, | %14
 A, ^G, !fermata!E, z |] %15
V:4
 z6"Am" A,2 |"C/E" E,2"F" F,G,"Am" A,B,"Am" C2 |"Dm/F" F,2"G7" G,2"C" !fermata!C,2"F#dim/A" A,2 | %3
"G" G,2"D" D2"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,"Am" C2 |"Dm/F" F,2"G7" G,2"C" !fermata!C,2"F#dim/A" A,2 | %7
"G" G,2"D" D2"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,"Em" E,F,"G" G,2"D/F#" ^F,^G, |"F#dim/A" A,B,"Am/C" CD"E" !fermata!E2"Am" A,G, | %11
"D/F#" ^F,E,"D" D,2"C/E" E,F,"G" G,2 |"F/A" A,G,"F/A" A,B,"C" C2"F#dim7" ^F,2 | %13
"G" G,2"Dm/F" =F,2"C+/E" E,C,"Dm/F" F,E, |"Bm7b5/D" D,B,,"E" E,2"A" !fermata!A,,2 z2 |] %15  