Create music compositions that adhere to the given structure and incorporate the provided musical concept.
X:1
L:1/8
M:2/4
K:D
['AddA BB B2', 'fa a2'  
X:1
L:1/8
M:2/4
K:D
 AddA | BB B2 | Aggf | fe e2 | AddA | BB B2 | gecA | d2 d2 :: fa a2 | fa a2 | ggec | dd d2 | 
 fa a2 | fa a2 | ggec | d2 d2 :|  