Develop a musical composition in line with the given structure and theme.
X:1
L:1/8
M:6/8
K:D
['cAA BAG A2 G FAA def', 'FAA def'  
X:1
L:1/8
M:6/8
K:D
 fed cAA | BAG A2 G | FAA def | g3 ezg | fdd cAA | BAG A2 G | FAA def | gec d2 :: FAA dAA | 
 FAA BGG | FAA def | g3 ezg | fdd cAA | BAG A2 G | FAA def | gec d2 :|  