Craft a musical composition that adheres to the specified musical theme and letter-based structure.
X:1
L:1/8
Q:1/8=325
M:6/8
K:G
['dBA GAE EDE G2 d', 'BGG dBd']  
X:1
L:1/8
Q:1/8=325
M:6/8
K:G
 dBA GAE | EDE G2 d | edB dBA | BGe ege | dBA GAE | EDE G2 d | AGE A2 B | GED D3 :: BGG dBd | 
 ege dBG | BGG dBd | edB AGA |1 BGG dBd | ege dBG | AGE A2 B | GED D3 :|2 B2 B deg | age dBG | 
 AGE A2 B | GED efe |]  