Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:4/4
K:C
['Add dcd', 'afd Bgf gec', 'AFA GEa a2']  
X:1
L:1/8
M:4/4
K:C
 BEA |[M:6/8][K:D]SOSOO .!fermata!PMTuCOMA | Add dcd | efg afd | Add dcd | edc d2 A | Add dcd | 
 efg aga | bab afd |{a} gec d2 :: A | dfa afd | Bgf gec | dcd Bgd | edc d2 A | dfa afd | Bgf gec | 
 dAF DFA | Bec d2 ::[M:9/8] B | AFA GEc d2 B | AFA GFE D2 (F/G/) | AFA GEa a2 g | fdf gec d2 B/B/ | 
 AFA GEc d2 B | AFA GFE D2 F/G/ | AFA GEa a2 g/g/ | fdf gec d2 :|  