Develop harmonious melodies based on the provided chord structures.
'G', 'D7', 'G', 'D7', 'G', 'C', 'G', 'D7', 'G', 'C', 'G', 'D7', 'G'  
X:1
L:1/8
M:2/4
K:none
[K:G]"G" de/d/ Bd |"D7" Ad fa | de/d/ cd |"G" Bd gb | de/d/ Bd |"D7" Ad fa | df/a/ c'f | 
"G" gg/f/ g z ::"C" ee e/g/f/e/ |"G" ed d2 |"D7" f/d/c/d/ a/d/c/d/ |"G" g/d/B/d/ g2 | 
"C" ee e/g/f/e/ |"G" ed d2 |"D7" f/d/c/d/ af |"G" gb g z :|  