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
['c GcEc Dddc GcEc GcEc FdEc DddB', 'ecgc eddf ecgc acgc fage dcde']  
X:1
L:1/8
M:4/4
K:C
 c | GcEc Dddc | GcEc GcEc | FdEc DddB | cGAF ECC :| f | ecgc eddf | ecgc acgc | fage dcde | 
 GAcd{f} e2 df | ecgc eddf | ecgc acgc | fage dcde | GAcd{cd} e2 dc ||  