Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/4
M:3/4
K:D
['D D']  
X:1
L:1/4
M:3/4
K:D
 D/D/ | D F A | A G E | E D D | D z D | D F A | d B d | A c B | A z A/A/ | A d c | d A F | G A B | 
 A z D | D F A | A G E/E/ | E D D | D2 ||  