Compose music pieces conforming to the prescribed pattern and incorporating the provided musical concept.
X:1
L:1/8
M:4/4
K:A
['f/e/c/ z/ e2 AB c2 a2', 'f/e/c/ z/ e2 AB c2 a2'  
X:1
L:1/8
M:4/4
K:A
|: AB c3 c Bd | c/B/G/ z/ A3 B c2 | BAA aagg A | deef f/e/c/ z/ e2 | AB c2 a2 g2- | 
 g a f2 f/e/c/ z/ e2 | AB c2 a2 c2 | c/B/G/ z/ E6 :: GA B3 c d2 | BG A3 B c2 | BAA aagg A | 
 deef f/e/c/ z/ e2 | AB c2 a2 g2- | g a f2 f/e/c/ z/ e2 | AB c2 a2 c2 | c/B/G/ z/ E6 :|  