Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:6/8
K:C
['cde{f} edc d2 B GAB', '(e/f/) g^fg']  
X:1
L:1/8
M:6/8
K:C
 G | cde{f} edc | d2 B GAB | ceg{a} gfe | dfe dcB | cde{f} edc | d2 B GAB | cBc ABc | dcB c2 :: 
 (e/f/) | g^fg agf | ge=f g2 (e/f/) | g^fg ag=f | edc def | g3 e3 | c3{d} cBA | GEF Gcd | efd c2 :|  