Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/16
M:2/4
K:G
['(G2FG) (A2GA) (B2AB) (c2Bc) d2d2', '(Bd).B.G (Bd).B.G', 'G4 B2d2 d2d2 d2ef g4 D2B2 B2G2', '(Bd).B.G A4']  
X:1
L:1/16
M:2/4
K:G
 (G2FG) (A2GA) | (B2AB) (c2Bc) | d2d2 edcB | dcBA gfed | (G2FG) (A2GA) | (B2AB) (c2Bc) | 
 d2d2 (edcB) | (dcBA) G4 :: (Bd).B.G (Bd).B.G | (Bd).B.G F4 | (Bd).B.G (Bd).B.G | (Bd).B.G A4 | 
 (G2FG) (A2GA) | (B2AB) (c2Bc) | d2d2 (edcB) | (dcBA) G4 :: B2d2 d2d2 | d2ef g4 | D2B2 B2G2 | 
 GFEF G4 | B2d2 d2d2 | d2ef g4 | D2B2 B2G2 | GFEF G4 |: (Bd).B.G A4 | (Bd).B.G A4 | 
 (Bd).B.G (Bd).B.G | (Bd).B.G A4 | B2d2 d2d2 | d2ef g4 | d2b2b2g2 | gfef g4 :|  