Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:6/8
K:G
['B2 c ded B2 G A2 F', 'd2 B']  
X:1
L:1/8
M:6/8
K:G
 B2 c | ded B2 G | A2 F DEF | G2 G BAB | d2 c ABc | ded Bdg | f2 e c2 e | d2 B cBA | G3 :: G2 A | 
 Bcd Bcd | e2 c e2 c | ABc ABc | d2 B d2 B | ded Bdg | f2 e c2 e | d2 B cBA | G3 :|  