Construct a musical work that combines the specified alphabet-based pattern with the given melodic theme.
X:1
L:1/8
M:4/4
K:G
['G2 g2 g2 d>B c>Bc>d e>fg>e d>BG>B', 'B2 B>A B>cd>B c>Bc>d e>fg>e d>BG>B']  
X:1
L:1/8
M:4/4
K:G
|: (3DEF | G2 g2 g2 d>B | c>Bc>d e>fg>e | d>BG>B e>dc>B | A>Bc>A G>FE>D | G2 g2 g2 d>B | 
 c>Bc>d e>fg>e | d>BG>B e>cA>F | G2 G2 G2 :: (3FGA | B2 B>A B>cd>B | c>Bc>d e>fg>e | 
 d>BG>B e>dc>B | A>Bc>A G>FE>D | B2 B>A B>cd>B | c>Bc>d e>fg>e | d>BG>B e>cA>F | G2 G2 G2 :|  