Compose a musical piece using the designated musical pattern's alphabetic representation and the assigned melodic theme.
X:1
L:1/8
M:2/4
K:D
['A2 defg ag/f/ eg', 'x a2 f2 g2 e2 aaff gg']  
X:1
L:1/8
M:2/4
K:D
 A2 | defg | ag/f/ eg | fdcd | (e/d/).c/B/ A2 | defg | ag/f/ eg | f"^1)"dec | d2 z x :: a2 f2 | 
 g2 e2 | aaff | gg e2 | defg | ag/f/ eg | fdec | d2 z x :|  