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
['d2 BG', 'G2 G2']  
X:1
L:1/8
M:4/4
K:G
 d2 BG d2 BG | FGAB cBAG | d2 BG d2 BG | FGAF G4 :| G2 G2 FGAB | cedc B2 (3ABA | G2 G2 BGdB | 
 c2 A2 G4 :|  