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:D
['(3DED FA', 'fd (3fga']  
X:1
L:1/8
M:4/4
K:D
 (3DED FA GEAF | (3DED FA d2 fa | geag fdcB | AB (3=cBA EFGE | (3DED FA GEAF | (3DED FA d2 fa | 
 geag fdcB | ABGE FD D2 :| fd (3fga g3 e | fd (3fga g2 ag | fdAF G2 FG | AB (3cBA dcAg | 
 fdfa g3 e | fdfa g2 ag | fddc AB (3cBA | EFGE FD D2 :|  