Compose music pieces conforming to the prescribed pattern and incorporating the provided musical concept.
X:1
L:1/8
M:2/4
K:D
['dfeg faaf', 'd3 g faeg faeg fe/d/ cd e/d/c/B/'  
X:1
L:1/8
M:2/4
K:D
 A | dfeg | faaf | fe/d/cd | e/d/c/B/ AA | dfeg | faaf | fe/d/ c/d/e/c/ | d3 :: g | faeg | faeg | 
 fe/d/ cd | e/d/c/B/ Ag | faeg | faaf | fe/d/ c/d/e/c/ | d3 :|  