Formulate chord sequences to heighten the harmonic quality of the specified musical portion.
G A B | c2 a | c2 g | B2 f | G A G | B2 f | G A B | c2 e | G A B | c2 a | c2 g | 
 B2 f | G A G | B2 f | g f B | c e g | c z z :| A c f | A3 | G c e | G2 c | 
 B a g | f2 B | c a g | e2 G | A c f | A3 | G c e | G2 c | B a g | f2 B | 
 c3/2 c/ c | c z z |:[K:F] c d e | f3/2 c/ A | a g f | e3/2 c/ B | c d c | e3/2 c/ B |1 
 b a g | f3/2 c/ A :|2 c' b e | f z z || d2 b | b a g | f2 c | a g f | e3/2 c/ c | 
 b a g | f a f | c2 f | d2 b | b a g | c3/2 a/ a | a g f | e3/2 c/ c | b2 e | 
 f3/2 f/ f | f z z |]  
X:1
L:1/4
M:3/4
K:C
"C" G A B | c2 a | c2 g |"G7" B2 f | G A G | B2 f | G A B |"C" c2 e | G A B | c2 a | c2 g | 
"G7" B2 f | G A G | B2 f | g f B |"C" c e g | c z z :|"F" A c f | A3 |"C" G c e | G2 c | 
"G7" B a g | f2 B |"C" c a g | e2 G |"F" A c f | A3 |"C" G c e | G2 c |"G7" B a g | f2 B | 
"C" c3/2 c/ c | c z z |:[K:F]"F" c d e | f3/2 c/ A | a g f | e3/2 c/ B | c d c | e3/2 c/ B |1 
 b a g | f3/2 c/ A :|2 c' b e | f z z ||"Bb" d2 b | b a g |"F" f2 c | a g f |"C7" e3/2 c/ c | 
 b a g |"F" f a f | c2 f |"Bb" d2 b | b a g |"F" c3/2 a/ a | a g f |"C7" e3/2 c/ c | b2 e | 
"F" f3/2 f/ f | f z z |]  