Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/4
Q:3/4=90
M:6/4
K:D
['d2 e', 'd2 e']  
X:1
L:1/4
Q:3/4=90
M:6/4
K:D
 A | d2 e f2 g | a3 b3 | g3/2 g/ f e2 f | g3 f3 | e3/2 d/ c d2 e | A3- A2 || f | e3/2 d/ c d2 e | 
 e3- e2 f | e3/2 d/ c d2 e | a3- a2 f | e d c B2 A | d2 e f2 b | a b f e2 d | d3 d2 |]  