Develop harmonious chord sequences that enhance the given music composition.
B c | d3 | B2 d | d e3/2 d/ | d B2 | c3 | A2 d | d e3/2 d/ | d B2 | d3 | g2 f | 
 e e3/2 e/ | g f e/e/ | d3 | d c B | A3- | A B c | d3/2 e/ d | c B A | G3- | 
 G :|  
X:1
L:1/4
M:3/4
K:G
 B c |"G" d3 | B2 d |"G" d e3/2 d/ | d B2 |"D7" c3 | A2 d |"G" d e3/2 d/ | d B2 |"G" d3 | g2 f | 
"C" e e3/2 e/ | g f e/e/ |"G" d3 | d c B |"D7" A3- | A B c |"G" d3/2 e/ d |"D7" c B A |"G" G3- | 
 G :|  