Write a tune that draws inspiration from Bach's musical creations.  
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 G | c c d d | e2 !fermata!d d | c B A A | B2 !fermata!B G | G G c c | !fermata!B2 z B | %7
 e e c c | d2 !fermata!B B | c c A A | B2 !fermata!G G | c d e d | !fermata!c3 z |] %13
V:2
 z3 E | E/F/ G A G | G2 !fermata!G G | G/^F/ G G F | G2 !fermata!G D | E E A A | %6
 !fermata!^G2 z =G | G G F F | ^F/G/ A/F/ !fermata!G G | G G ^F F | ^F B, !fermata!B, B, | %11
 C F E/F/ G/F/ | !fermata!E3 z |] %13
V:3
 z3 C | C C C B, | C2 !fermata!B, B, | C D E D | D2 !fermata!D B, | C C/D/ E E | !fermata!E2 z E | %7
 E/D/ C/B,/ A,/B,/ C/B,/ | A, D !fermata!D D | E E E D | ^D/E/ ^F/D/ !fermata!E =D | G, B, C B, | %12
 !fermata!G,3 z |] %13
V:4
 z6"C" C,2 |"C" C,D,"C/E" E,2"Dm7/F" F,2"G" G,2 |"C" C,D,"C/E" E,F,"G" !fermata!G,2"G" G,,2 | %3
"Am" A,,2"G/B" B,,2"Am7/C" C,2"D" D,2 |"G" G,4"G" !fermata!G,,2"G" G,=F, | %5
"C/E" E,D,"C" C,B,,"Am" A,,B,,"Am/C" C,D, |"E" !fermata!E,4 z2"Em" E,D, | %7
"C" C,D,"C/E" E,C,"F" F,G,"F/A" A,F, |"D" D,E,"D/F#" ^F,D,"G" !fermata!G,2"G" G,,2 | %9
"C" C,D,"C/E" E,C,"D" D,E,"D/F#" ^F,D, |"B" B,,^C,"B/D#" ^D,B,,"Em" !fermata!E,2"G" G,=F, | %11
"C/E" E,F,"Bdim/E" E,D,"C" C,2"G" G,2 |"C" !fermata!C,6 z2 |] %13  