Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
Q:3/8=88
M:3/8
K:G
['', 'G AFG A2 d cBA |1 G2', 'c/B/A/c/ B2 D :|2 d c/B/A/B/ GzG']  
X:1
L:1/8
Q:3/8=88
M:3/8
K:G
 G |: AFG | A2 d | cBA |1 G2 G :|2 G2 D |: G G/G/G/B/ | dBd |1 d c/B/A/c/ | B2 D :|2 d c/B/A/B/ | 
 GzG |: AFG | A2 d | cBA |1 G2 G :|2 G z ||  