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
['(DEFG) A2 B2B2 GBAG E2G2', 'b2>f2 efed B2d2']  
X:1
L:1/16
M:2/4
K:G
 D2 | (DEFG) A2 B2B2 | GBAG E2G2 | cdcB A2F2 | Ddde d2>D2 | (DEFG) A2 B2B2 | GBAG E2G2 |1 
 (ef)gf e2d2 | (Bc)AF [GB]2 :|2 (cdc)B A2F2 | (DED)B, G,2 |: (Bc) | d2b2 b2>f2 | efed B2d2 | 
 gfga b2g2 | (e2<a2)g a2(Bc) | d2b2 b2>f2 | efed B2d2 | efgf e2d2 | BcAF [GB]2 :|  