Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/4
Q:1/2=100
M:4/4
K:D
['d D F A', 'f/g/ a']  
X:1
L:1/4
Q:1/2=100
M:4/4
K:D
 z | d D F A | B/A/B/c/ d e | f/g/ a B/c/ d | e3/2 f/ e d/c/4d/4 | d D F A | B/c/ d c a/g/ | 
 f d e c | d2 d :: f/g/ | a f2 a | f d2 e/f/ | g/f/e/d/ c d | e3 f/g/ | a f d f | A d F A | 
 d3/2 e/ e3/2 d/ | d3 :|  