Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
M:4/4
K:D
['A2 F2 F/E/D A3 d', 'f3 e']  
X:1
L:1/8
M:4/4
K:D
 A2 | F2 F/E/D A3 d | B>A Bd e3 f | gbeg fa d>f | g>f ed e2 A2 | F2 F/E/D A3 d | B>c de f3 e | 
 dB dc/B/ A<d Fd | B<e cA d2 || c2 | B2 Bd _BcFc | =B>c de f3 e | d/e/f Bd c/d/e Fe | dBcA B3 B | 
 d2 ad c2 ac | BgdB f3 e | dB dc/B/ Ad F>d | Be c>A d2 ||  