Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:4/4
K:D
['', 'D2 DE', 'fdef dBAF']  
X:1
L:1/8
M:4/4
K:D
 E |: D2 DE FDFA | B2 BA BAFE | D2 DE FAAF | GFEF DB, B,2 | D2 DE FDFA | B2 BA Bdde | fdef dBAF | 
 AFEF (D2 D2) :: fdef dBAF | AFED DEFG | Ad d2 faaf | gfed B2 AB | D2 DE FDFA | B2 BA Bdde | 
 fdef dBAF | AFEF (D2 D2) :|  