Create a musical composition that adheres to the provided structure and theme.
X:1
L:1/8
M:3/4
K:D
['a2 ag fe']  
X:1
L:1/8
M:3/4
K:D
 a2 ag fe | de fg e2 | a2 ag fe | de fg e2 | dc de fd | (gf) ed e2 | dc de fd | (gf) ed e2 | 
 a2 ag fe | d2 d2 d2 |]  