Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:6/8
K:G
['g2 d BAG', 'B2 d dcB']  
X:1
L:1/8
M:6/8
K:G
 e | g2 d BAG | BcB def | g2 d BAG | cAB c2 d/e/ | g2 d BAG | BBB def | gab efg | cAB c2 :: 
 (d/c/) | B2 d dcB | c2 e edc | B2 d dcB | cde A2 d/c/ | Bcd dcB | cde edc | gab efg | cAB c2 :|  