Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:6/8
K:G
['B2 A G2', 'dBG gGG G2 d/c/ Bcd def aAA', "gag bc'b afd fga aba Tg>fe dBG"]  
X:1
L:1/8
M:6/8
K:G
 B/c/d/B/G GBG | c2 d efg | Tfed ded | TB A G G2 D | G2 d B/c/dB | c2 e fga | Tf2 d dfd |1 
 B2 A G2 z :|2 B2 A G2 || d/c/ | Bcd dBG | gGG G2 d/c/ | Bcd def | aAA A2 b | c'a/b/c' bg/a/b | 
 afd dfd | e/f/ge f/g/af | g3 g2 || d | efg gag | bc'b afd | fga aba | Tg>fe dBG | GBG A/B/cA | 
 AcA B/c/dB | Bdg Tfdf | g3 g2 |]  