Compose music pieces conforming to the prescribed pattern and incorporating the provided musical concept.
X:1
L:1/8
M:2/2
K:D
['B2 A2 F2'  
X:1
L:1/8
M:2/2
K:D
|:"D" a2 ab a2 ef |"G" g2 ga g2 a2 |"D" fedd fded |"A" B2 A2 F2 A2 ::"D" d2 e2 dded | 
"A" d2 dc B2 c2 |"D" d2 e2 dded |"A" B2 A2 F2 A2 :|  