Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
Q:1/8=120
M:6/8
K:G
['GBB BAB GBd def gfe dcB', 'G2 d gfg efg faf def gfgefg']  
X:1
L:1/8
Q:1/8=120
M:6/8
K:G
 D | GBB BAB | GBd def | gfe dcB | BAA A2 A | GBB BAB | GBd def | gfe dcB | BGG G2 :| d | gfg efg | 
 faf def | gfgefg | aAA A2 A | GBB BAB | GBd def | gfe dcB | BGG G2 :|  