Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
M:4/4
K:G
['G>D EG B>A', 'G2 de/f/ g>f e<d B2 de/f/ g>B']  
X:1
L:1/8
M:4/4
K:G
 G>D EG B>A B2 | de/f/ g>B A<G =F2 | G>D EG B>A B<g | G<G B>G A2 G2 :: de/f/ g>f e<d B2 | 
 de/f/ g>B A<G =F2 | g>b e>g d>e B>g | G<G B>G A2 G2 :|  