Compose music pieces conforming to the prescribed pattern and incorporating the provided musical concept.
X:1
L:1/4
Q:1/4=120
M:2/2
K:C
['d c']  
X:1
L:1/4
Q:1/4=120
M:2/2
K:C
 c/d/ | e e f f | e3/2 f/ e g | f e d c | B3/2 c/ B B/c/ | d d c B/A/ | B/>A/ B/c/ B e | d c c B | 
 c3/2 c/ c |]  