Develop harmonious melodies based on the provided chord structures.
'G', 'D', 'D7', 'G', 'Am', 'G/D', 'D', 'G'  
X:1
L:1/8
Q:1/4=90
M:3/4
K:G
 G>A |"G" G2 D2 B>c | B2 G2 d>e | d2 c2 B2 |"D" A3 z B2 | A2 AB"D7" cA |"G" B2 G2 G>B | 
"Am" A2"G/D" G2"D" F2 |"G" G3 z |]  