Develop a musical composition that aligns with the given structural outline and thematic content.
X:1
L:1/8
M:3/4
K:D
['f3 dAF', 'f2 e2'  
X:1
L:1/8
M:3/4
K:D
 D3 FAd | f3 dAF | G3 FGe | B6 | a3 gec | A3 ceg | f3 dAF | d6 | D3 FAd | f3 dAF | G3 FGe | B6 | 
 a3 gec | A3 gfe | d3 edc | d6 :: f2 e2 f2 | g2 f2 e2 | d3 cdb | a6 | a3 gec | A3 ceg | f3 dAF | 
 d4 e2 | f2 e2 f2 | g2 f2 e2 | d3 cdb | a6 | age age | age age | a2 b2 c'2 | d'6 :|  