Develop a musical composition that aligns with the given structural outline and thematic content.
X:1
L:1/8
M:2/2
K:D
['=c2 BGAG FGA=c BGAF BEE=c BGAG FGAg', 'f>gaf g>abg'  
X:1
L:1/8
M:2/2
K:D
 =c2 | BGAG FGA=c | BGAF BEE=c | BGAG FGAg | fdec dD D :: f>gaf g>abg | f>gaf beeg | f>gaf g>abg |1 
 fdec dD D :|2 fdec dD D=c ||  