Construct a music composition that complies with the designated structure and theme.
X:1
L:1/8
M:6/8
K:A
['cBA efg', 'e2 a c2 a efg'  
X:1
L:1/8
M:6/8
K:A
|: a/f/ | eAA cBA | efg aga | fBB fga | bag agf | e2 A cBA | efg a2 f | edc dcB | cAA A2 :: a/f/ | 
 e2 a c2 a | efg aga | fBB fga | bag a2 f |1 e2 a c2 a | efg agf | edc dcB | cAA A2 :|2 e2 A cBA | 
 efg agf | e2 c dcB | cAA A2 ||  