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
['BG G2']  
X:1
L:1/8
M:4/4
K:G
"D" A3 c"G" BG G2 | BGBd g2 fg |"D" eA A2"G" BGBd | (3efg dc BAGB |"D" A3 c"G" BG G2 | BGBd g3 a | 
 bgag"C" (3efg"D" fa | gedc"G" BG G2 ::"G" bg g2"C" agef |"G" g3 e"D" dega |"G" bg g2 aged | 
"C" eaag"D" a2 ga |"G" bg g2"C" agef |"G" g3 e"D" dega |"G" bgag"C" (3efg fa |"D" gedc"G" BG G2 :|  