Create music compositions that adhere to the given structure and incorporate the provided musical concept.
X:1
L:1/4
Q:1/2=80
M:4/4
K:D
['f e e', 'f g'  
X:1
L:1/4
Q:1/2=80
M:4/4
K:D
 a/g/ | f f e e | d e f d | e f g f | (e/d/c/B/) A (a/g/) | f f g a | b a g f | e e a a | d3 :: f | 
 g f g f | (e/d/c/B/) A f | g f g f | e2 z a/g/ | f f g a | b a g f | e e a a | d2 z A | d2 A2 | 
 F2 A2 | d A d B | d f a f | (e/g/)e/d/ (c/B/)B/c/ | (d/e/).f/.g/ (a/f/).e/.d/ | 
 (e/g/).e/.d/ (c/A/).B/.c/ | d f d2 |]  