Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/4
M:2/4
K:D
['f e/f/ g', 'b G b E b g f/g/']  
X:1
L:1/4
M:2/4
K:D
 d c/d/ e d/c/ | d A F A | f e/f/ g f/e/ | f d A d | a2 b2 | c2 d2 | f e/f/ g f |{f} e2 :: 
 a g/a/ b b | G b E b | g f/g/ a a | F a D a | g e/f/ g g | E g A g | f e/d/ e c | d2 d2 :|  