Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
M:6/8
K:G
['dge dBG AEF GDB, G,B,D GBd', 'Bdg bag gfe edc B/c/dB']  
X:1
L:1/8
M:6/8
K:G
|: dge dBG | AEF GDB, | G,B,D GBd | cBc ABc | dge dBG | AEF GDB, | G,B,D GBd | cAF G2 :: Bdg bag | 
 gfe edc | B/c/dB cAG |1 FAD D2 c | Bdg bag | gfe edc | B/c/dB cAF | AGF G3 :|2 FAD Ddc | BAB GBd | 
 cGE CEG | FEF Dba | gdB G3 ||  