Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/4
M:4/4
K:C
['G, A,']  
X:1
L:1/4
M:4/4
K:C
 G, | A, G, A, B, | C G, z C | B, D C E | D2 z G, | E D C B, | B, A, z G, | A, D C B, | C2 z |]  