Compose music pieces conforming to the prescribed pattern and incorporating the provided musical concept.
X:1
L:1/8
M:2/4
K:G
['G2 z']  
X:1
L:1/8
M:2/4
K:G
 d2 cA | G2 z d | ddcA | G2 z B | BBBB | Addd | ddcA | GGG z |]  