Compose a musical piece using the designated musical pattern's alphabetic representation and the assigned melodic theme.
X:1
L:1/8
M:4/4
K:A
['a2 ab aecA', 'Acec dAcA']  
X:1
L:1/8
M:4/4
K:A
|: (3efg | a2 ab aecA | defd edcA | a2 ab aecA | defg a2 ef | =gaba gfge | defd efed | c2 AB cABA | 
 GABG A2 :: (3EFG | Acec dAcA | BAGA BcdB | Acec dAcA | BGGE A2 (3EFG | Acec dAcA | BAGA BcdB | 
 e3 e2 fec | BGGE A2 :|  