Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:6/8
K:G
['B3- Bc^c dBg d3- deB', 'z deB d2 z c3- cB^A Bed']  
X:1
L:1/8
M:6/8
K:G
|: B3- Bc^c | dBg d3- | deB c3- | cAd D2 z | B3- Bc^c | dBg d3- | deB cAd | G2 z [gB]2 z :| 
 !fermata!Bc^c deB | d2 z c3- | cB^A Bed | c3- c2 z | ^cd^d efc | e2 z d3- | d^cB cfe | 
 d3"_D.C." ^c3 |]  