Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
M:2/2
K:Gmin
['G D(GG)d BAGF CFAf cFAF D(GG)A Bcdf', 'dcBc defd']  
X:1
L:1/8
M:2/2
K:Gmin
 G | D(GG)d BAGF | CFAf cFAF | D(GG)A Bcdf | cA^Fd BGG :| B | dcBc defd | cBAB deAc | dcBb dBfd | 
 cA^Fd BGGB | dcBc defd | CBAB ceAF | DG^FG DBc=f | cA^Fd BGG ||  