Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:2/4
K:A
['A>B ce', 'c>d cB', 'c>c cB', 'fe fa/f/ ec |1 BA AB :|2']  
X:1
L:1/8
M:2/4
K:A
 A>B ce | ae fa | A>B ce | fc ec | A>B ce | ae fe | fa/f/ ec |1 BA A2 :|2 BA AB |: c>d cB | 
 c/d/e fe | c>d cB | c/B/A B2 | c>d cB | c/d/e fe | fa/f/ ec |1 BA AB :|2 BA A2 |: 
"^Variations" A>B ce | ae fe | A>B ce | c/B/A B2 | A>B ce | ae fe | fa/f/ ec |1 BA A2 :|2 BA AB |: 
 c>c cB | ce fe | c>B ce | c/B/A B2 | c>c cB | ce fe | fa/f/ ec |1 BA AB :|2 BA A2 ||  