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
['BGAG EGDE G2 Bd edgd BGAG EG', 'G2 Bddg edBA']  
X:1
L:1/8
M:4/4
K:G
 BGAG EGDE | G2 Bd edgd | BGAG EG D2 | BdAc BG G2 :| Bddg edBA | Bdea gfed | BddB (3ded gd | 
 B2 Ac BG G2 | Bddg edBA | Bdef g3 a | b2 af gfed | egfa gedc ||  