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:D
['dcd AFA', 'dA=c BAG eBd ^cBA']  
X:1
L:1/8
M:6/8
K:D
 dcd AFA | dfd ecA | dcd AFA | dec d3 :: dA=c BAG | eBd ^cBA | dA=c BAG | eBd ^cBA | efg fed | 
 eBc d3 :|  