Create a musical composition using the given alphabetical pattern and melodic theme.
X:1
L:1/8
Q:3/8=50
M:3/8
K:G
['GBd GBd dcA cBG dcA BGG', 'G3 FAd FAd BAF AGE DFA FAd', 'GBg ecc edB']  
X:1
L:1/8
Q:3/8=50
M:3/8
K:G
"_Allegretto" GBd | GBd | dcA | cBG | dcA | BGG | B/A/c/A/G/F/ | G3 :: FAd | FAd | BAF | AGE | 
 DFA | FAd | BAF | D3 :: GBg | ecc | edB | dcA | GBg | ecc | edB | G3 :|  