Compose music pieces conforming to the prescribed pattern and incorporating the provided musical concept.
X:1
L:1/8
M:2/4
K:Amix
['B2 BA Bd ed/e/ fd de fA', 'ag fg ed/e/'  
X:1
L:1/8
M:2/4
K:Amix
|: B2 BA | Bd ed/e/ | fd de | fA BA | AB cd | ef ed/e/ | fA B2 | A4 :: a2- ag | fg ed/e/ | fd de | 
 fd ed | fa ag | fg ed/e/ | fa B2 | A4 :|  