Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
Q:1/8=200
M:2/4
K:A
['A2 c/B/A/G/ Acea gbed c A2 B', 'E2 e =g2 f f/e/d/c/ d2 B', 'd2 d c2 d', 'f2 f fdf']  
X:1
L:1/8
Q:1/8=200
M:2/4
K:A
 A2 c/B/A/G/ | Acea | gbed | c A2 B | ce^df | e g2 e | fa g/f/e/^d/ | e2 E2 :: e =g2 f | 
 f/e/d/c/ d2 | B d2 f | e/d/c/B/ c2 | A c2 e | d/c/B/A/ GB | Ed c/B/A/G/ | A2 A,2 :: 
[M:6/8][K:D] A | d2 d c2 d | efe efg | d2 d c2 d | ecA A2 A | d2 d c2 d | efd efg | afd gec | 
 d2 d d2 :: e | f2 f fdf | g2 g geg | f2 f fdf | ecA A2 g | faf def | gbg efg | afd gec | 
 d2 d d2 :|  