Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/16
M:2/4
K:D
['A2a2 fgfe d2G2 B4 Aceg ecAc', 'B2ed cdBc A2cd ecAc eagf efed c2fe']  
X:1
L:1/16
M:2/4
K:D
|: A2a2 fgfe | d2G2 B4 | Aceg ecAc | dcde f2d2 | A2a2 fgfe | d2G2 B4 | Aceg ecAc |1 d2d2 d4 :|2 
 d2d2 d2cd |][K:A] ecAc eagf | efed c2fe | decd B2ed | cdBc A2cd | ecAc eagf | efed c2fe | 
 dcBc defg | a2a2 a4 :|  