Create a musical composition based on the alphabetic representation of the predetermined pattern and the given melodic theme.
X:1
L:1/8
M:2/4
K:A
['A>B ce fg a2 fe', 'a2 fe']  
X:1
L:1/8
M:2/4
K:A
 A>B ce | fg a2 | fe ce | f/a/f/e/ ce | A>B ce | fg a2 | fe cB |1 A2 AE :|2 A2 A2 |: a>g fe | 
 fg a2 | fe ce | f/a/f/e/ ce | a>g fe | fg a2 | fe cB |1 A2 A2 :|2 A2 AE ||  