Compose a musical piece using the designated musical pattern's alphabetic representation and the assigned melodic theme.
X:1
L:1/8
M:3/4
K:D
['e2 f2', 'ba gf']  
X:1
L:1/8
M:3/4
K:D
 D2 DE FD | F2 FG AF | A2 AB cA | d4 e2 | f2 d2 e2 | f2 d2 e2 | f2 gf ef | d6 :: a2 fg ab | 
 a2 ba gf | g2 ef ga | g2 ag fe | f2 de fg | f2 g2 a2 |1 ba gf ed | e6 :|2 gf ed ec | d6 ||  