Develop a musical composition that aligns with the given structural outline and thematic content.
X:1
L:1/8
M:2/4
K:D
['(a>f)(a>f) .d.d(de) efge fd d2 (a>f)(a>f) .d.d(df)', 'd2 c>def g2 e2 d>efg a2 f2', 'd2 (a>b).a.a (ba)(gf) edef dAF[DA] (ab).a.a bagf'  
X:1
L:1/8
M:2/4
K:D
 (a>f)(a>f) | .d.d(de) | efge | fd d2 | (a>f)(a>f) | .d.d(df) | e>gec | d2 d2 :: c>def | g2 e2 | 
 d>efg | a2 f2 | e>fga | bgfe | fdec | d2 d2 :: (a>b).a.a | (ba)(gf) | edef | dAF[DA] | (ab).a.a | 
 bagf | edce | d2 d2 :|  