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
['ef/e/ ce fe c2 A>B cA', 'ef/e/ ce']  
X:1
L:1/8
M:2/4
K:A
 ef/e/ ce | fe c2 | A>B cA | ec B2 | ef/e/ ce | fe c2 | A>B cA | FA E2 :| F>B AF | cB A2 | 
 ef/e/ ce | ag f2 | ef/e/ ce | fe c2 | A>B cA | FA A2 :|  