Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/16
Q:1/2=60
M:2/4
K:Gdor
['d2d2 d2cB |{d} c2BA B2G2 d2d2 dg^fg', 'dBAG FGAB cAGF GABc dg^fg dcBA G4', 'z4 c4 z4 d2d2 dg^fg BcBA']  
X:1
L:1/16
Q:1/2=60
M:2/4
K:Gdor
 d2d2 d2cB |{d} c2BA B2G2 | d2d2 dg^fg | dcBA G4 :: GABc dBAG | FGAB cAGF | GABc dg^fg | dcBA G4 :| 
 B4 z4 | c4 z4 | d2d2 dg^fg | BcBA G4 :|  