Develop a musical composition that aligns with the given structural outline and thematic content.
X:1
L:1/8
M:4/4
K:D
['DEFA dcde fded Bdef gfed fedB', 'D3 E F3 F FEDC D3 G'  
X:1
L:1/8
M:4/4
K:D
 DEFA dcde | fded Bdef | gfed fedB | AFDE FE E2 | DEFA dcde | fded Bdef | gfed fedB | AFDE D4 :| 
[K:C] D3 E F3 F | FEDC D3 G | E3 F G3 G | GFGA GFDC | D3 E F3 F | FEDC D3 G | E3 F G3 G | 
 GFDC D3 D :|  