Create a musical composition using the given alphabetical pattern and melodic theme.
X:1
L:1/8
Q:1/4=200
M:2/2
K:G
['B G3', 'g3 d', '(3Bcd gd Bdgd']  
X:1
L:1/8
Q:1/4=200
M:2/2
K:G
|: B G3 BGdG | B G3 (3Bcd gd | B G3 BdcB | AGFG ABcA :: g3 d BGBd | g3 d fgaf | g3 d BGBd | 
 AGFG ABcA :: (3Bcd gd Bdgd | Bdgd BG G2 | Ac=fc Ac=fc | Ac=fc A=F F2 | (3Bcd gd Bdgd | Bdef g3 a | 
 bgaf gdBd | AGFG ABcA |]  