Create musical compositions adhering to the given structure and incorporating the provided musical concept.
X:1
L:1/8
M:2/4
K:D
['f2 fe dB B2', 'fd ed/e/'  
X:1
L:1/8
M:2/4
K:D
|: f2 fe | dB B2 | Ad d/c/d/e/ | fe eA | f2 fe | dB B2 | Aa a>g |1 fd de :|2 fd dd/e/ |: fd ed/e/ | 
 fd ed/e/ | fa a>g | fd ed/e/ | fd ed/e/ | fd ed/e/ | fa a>g |1 fd dd/e/ :|2 ed de ||  