Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/8
M:6/8
K:G
['d gfe dcB edc BAG', 'd BGG dGG eGG dGG']  
X:1
L:1/8
M:6/8
K:G
 d | gfe dcB | edc BAG | cde dcB | cAA A2 d | gfe dcB | edc BAG | ced eaf | ggg g2 :: d | BGG dGG | 
 eGG dGG | BGG dcB | cAA A2 d | BGG dGG | eGG dGG | cde dec | BGG G2 :|  