Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
Q:1/4=100
M:4/4
K:G
['gfgd BcdB', 'G2 BGcA dBec BGcA FAAB (3Bcd (3cde']  
X:1
L:1/8
Q:1/4=100
M:4/4
K:G
 gfgd BcdB | gfgB cAAf | gfgd BcdB | ceAc BG G2 :: BGcA dBec | BGcA FAAB | (3Bcd (3cde (3def gB | 
 cAdc BG G2 :|  