Construct chord patterns that blend well with the existing music piece.
(e a g) | f3 | (B e d) | c3 | .e f3/2 e/ | (d/f/) b b | .a g3/2 f/ | 
 (e/c/) .G .G | (e a g) | f3 | (B e d) | c3 | .e f3/2 e/ | d3/2 e/ f/g/ | 
 b3/2 a/ f/d/ |1 c z z :|2 c z d |:[K:G] b a3/2 g/ | .g .f .e | d z/ c/ A | f3 | 
 d/d/ d d | (e2 d) | d/d/ d b | (a2 g) | b a3/2 g/ | .g .f .e | d z/ c/ A | f3 | d/d/ d e | 
 (f b a) |1 (g3 | g) z d :|2 (g3 | g) z z |:[K:C] .e .e .a | g3/2 f/ B | .d .d .b | 
 a3/2 g/ e | .g .g .c' | d'3/2 c'/ b/a/ | ^f/g/ .b .a | (a/g/) e2 | .e .e .a | 
 g3/2 f/ B | .d .d .b | a3/2 g/ e | .e .e .c' | d'3/2 c'/ b/a/ | (^f/g/) .a .B |1 
 c z z :|2[K:F] c z a |: (g2 f) | e/f/ g f | (f2 e) | ^d/e/ f e | e d/e/ d | 
 ^c/d/ e d | d c/d/ c | A c a | (g2 f) | e/f/ g f | (e2 d) | ^c/d/ e d | 
 d c/d/ c | =B/c/ d e | f3/2 f/ f |1 f z a :|2 f z z |]  
X:1
L:1/4
M:3/4
K:C
"C" (e a g) |"G7" f3 | (B e d) |"C" c3 | .e f3/2 e/ |"G7" (d/f/) b b | .a g3/2 f/ | 
"C" (e/c/) .G .G | (e a g) |"G7" f3 | (B e d) |"C" c3 | .e f3/2 e/ |"G7" d3/2 e/ f/g/ | 
 b3/2 a/ f/d/ |1"C" c z z :|2"C" c z d |:[K:G]"G" b a3/2 g/ | .g .f .e |"D7" d z/ c/ A | f3 | 
 d/d/ d d | (e2 d) |"G" d/d/ d b | (a2 g) | b a3/2 g/ | .g .f .e |"D7" d z/ c/ A | f3 | d/d/ d e | 
 (f b a) |1"G" (g3 | g) z d :|2"G" (g3 | g) z z |:[K:C]"C" .e .e .a |"G7" g3/2 f/ B | .d .d .b | 
"C" a3/2 g/ e | .g .g .c' |"F" d'3/2 c'/ b/a/ |"G7" ^f/g/ .b .a |"C" (a/g/) e2 | .e .e .a | 
"G7" g3/2 f/ B | .d .d .b |"C" a3/2 g/ e | .e .e .c' |"Dm/F" d'3/2 c'/ b/a/ |"G7" (^f/g/) .a .B |1 
"C" c z z :|2[K:F]"C" c z a |:"F" (g2 f) | e/f/ g f |"C7" (f2 e) | ^d/e/ f e |"Gm/Bb" e d/e/ d | 
"C7" ^c/d/ e d |"F" d c/d/ c | A c a | (g2 f) | e/f/ g f |"Gm/Bb" (e2 d) | ^c/d/ e d | 
"C7" d c/d/ c | =B/c/ d e |"F" f3/2 f/ f |1 f z a :|2 f z z |]  