Compose music pieces conforming to the prescribed pattern and incorporating the provided musical concept.
X:1
L:1/4
M:4/4
K:C
['A G']  
X:1
L:1/4
M:4/4
K:C
 C E G c/B/ | A G E/ G3/2 | c2 d2 | e d c2 | e d c A | G E D/ C3/2 | E E E/E/ G | D E C2 |]  