Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
M:9/8
K:D
['B2 G']  
X:1
L:1/8
M:9/8
K:D
 EDE B2 G F2 G | E2 B B2 G AFD | EDE B2 G F2 B | AGA dBG AFD :|  