Construct a musical work that combines the specified alphabet-based pattern with the given melodic theme.
X:1
L:1/8
M:2/4
K:G
['DG AB', 'dB BA/B/ dB BA GE']  
X:1
L:1/8
M:2/4
K:G
 DG AB | DG AB | GE ED/E/ | GE EG | DG AB | DG AB | GE fG | AG G2 || dB BA/B/ | dB BA | GE ED/E/ | 
 GE EA | dB BA/B/ | dB BA | GE fG | AG G2 ||  