Develop a musical composition that aligns with the given structural outline and thematic content.
X:1
L:1/8
M:2/4
K:D
['D2 D2']  
X:1
L:1/8
M:2/4
K:D
 z2 DF | AA AB | AA GF | EF GA | GG FE | DE FG | FF ED | AA AA | EG FE | D2 D2 | D2 GF | E2 E2 | 
 E2 FG | A2 d2 | B2 AG | FF EE | D2 z2 |]  