Craft a composition that exemplifies the distinctive elements of Bach's music.  
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
 z3 A | A c B A | c d !fermata!e e | e e/f/ g/f/ e | d d !fermata!c c | c e d B | %6
 c d !fermata!e e | e e d d | c3/2 B/4A/4 !fermata!G G | c/d/ e d e | c B !fermata!A z |] %11
V:2
 z3 E | E/^F/ G/A/ G/=F/ E | A/G/ F/G/ !fermata!G G | G A B c | c/B/4A/4 B !fermata!G A | %5
 A/B/ c c/B/4A/4 G | G G !fermata!G G | G G G/>F/ E | E ^F !fermata!E E | A/B/ c c B | %10
 B/ A ^G/ !fermata!E z |] %11
V:3
 z6 C2 | C2 ED D2 CB, | A,/B,/ C2 B, !fermata!C2 CD | ED C2 D2 CE | A2 GF !fermata!E2 E2 | %5
 F2 G2 G2 D2 | C3 B, !fermata!C2 C2 | C2 C3 B, B,2 | B,A, A,B,/C/ !fermata!B,2 CD | ED CB, A,2 E2 | %10
 EF B,E !fermata!C2 z2 |] %11
V:4
 z6"Am" A,,2 |"Am" A,2"C/E" E,^F,"G" G,^G,"Am" A,=G, |"F" F,E,"Dm" D,G,"C" !fermata!C,2"C" C,2 | %3
"C" CB,"Am" A,2"G" G,2"Am" A,G, |"Dm7/F" F,2"G" G,2"C" !fermata!C,2"Am" A,G, | %5
"F" F,E,"C/D" D,C,"Gsus4" G,3 F, |"C/E" E,C,"Gsus4" G,2"C" !fermata!C,2"C" C,2 | %7
"C" C,D,"C/E" E,F,"Gsus4" G,2"E7/G#" ^G,E, |"Am" A,2"D#dim7" ^D,2"Em" !fermata!E,2"C" C,B,, | %9
"Am" A,,2"Am" A,G,"D7/F#" ^F,2"E/G#" ^G,2 |"Am" A,D,"Esus4" E,2"Am" !fermata!A,,2 z2 |] %11  