Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/8
Q:3/8=105
M:12/8
K:D
['dAd dAd', 'ded fga BcB']  
X:1
L:1/8
Q:3/8=105
M:12/8
K:D
 dAd dAd dAd f2 d | c2 e eBe BeB Tc2 A | dAd dAd dAd f2 d | B/c/dB c/d/ec d3 D3 :: 
 ded fga BcB Tc2 B | ABA cBc ABA cBA | ded fga BcB c2 A | B/c/dB c/d/ec d3 D3 :|  