Construct a music composition that complies with the designated structure and theme.
X:1
L:1/8
M:6/8
K:G
['BAB gfg gab', 'efe edB'  
X:1
L:1/8
M:6/8
K:G
 BA | G3 BAB | gfg gab | G3 BAB | dBA ABA | GFG BAB | gfg gab | Age edB | dBA A :: Bd | efe edB | 
 ded dBd | efe edB | dBA ABd | efe edB | ded def | gfg ege | dBA A :|  