Develop melodies adhering to the specified musical structure and using the offered theme.
X:1
L:1/8
Q:1/4=30
M:3/8
K:D
['dde fdf', '(a^g=g) fdf gec'  
X:1
L:1/8
Q:1/4=30
M:3/8
K:D
 dde | fdf | gec | dfa | dde | fdf | gec | d2 :: a | (a^g=g) | fdf | gec | dfa | (a^g=g) | fdf | 
 gec | d2 :|  