Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
Q:3/8=150
M:6/8
K:D
['F2 D', 'ABA c2 d e2 f g2 e']  
X:1
L:1/8
Q:3/8=150
M:6/8
K:D
 D2 G F2 D | A,2 D F2 D | ABA A2 d | c2 d e3 | DED F2 D | A,2 D F2 D | ABA B2 c | d3 d3 :: 
 ABA c2 d | e2 f g2 e | f2 d d2 f | ecA A2 B | ABA c2 d | e2 f g2 e | faf edc | d3 D3 :|  