Develop melodies adhering to the specified musical structure and using the offered theme.
X:1
L:1/8
M:6/8
K:D
['D2 F E2 F DFA AFA BAB', 'fed faf gbg'  
X:1
L:1/8
M:6/8
K:D
|: D2 F E2 F | DFA AFA | BAB def | gfg ecA | D2 F E2 F | DFA AFA | BAB d2 e2 | fdd d2 :: fed faf | 
 gbg faf | fec faf | gfg e2 g | fed faf | gbg fed | BAB d2 e2 | fee e2 f :|  