Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
M:3/4
K:D
['AG FA', 'Ad f2 fa gf e2 eg fe']  
X:1
L:1/8
M:3/4
K:D
|: DF | A2 AG FA | d2 dA BA | G3 B AG | FA EA DF | A2 AG FA | de dA BA | G3 g fe | d4 :: Ad | 
 f2 fa gf | e2 eg fe | d2 df ed | cd Bd Ad | f2 fa gf | e2 eg fe | d2 df ec | d4 :|  