Develop harmonious melodies based on the provided chord structures.
'G', 'C', 'G', 'D7', 'D7', 'G', 'C', 'G', 'Am', 'D7', 'G', 'G', 'D7', 'G', 'D7', 'G', 'Am', 'D7', 'C', 'D7', 'G'  
X:1
L:1/8
M:6/8
K:G
"^A" D |"G" G2 B BGB |"C" cdc"G" BAG |"D7" FGA ABA |"D7" AdA FED |"G" G2 B BGB |"C" cdc"G" BAG | 
"Am" F2 E"D7" DEF |"G" G3 G2 :|"^B" d/f/ |"G" gag gdB |"D7" ABA ABd |"G" gag gdB |"D7" ded def | 
"G" gag gdB |"Am" AcB"D7" AGE |"C" G2 E"D7" DEF |"G" G3 G2 :|  