Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/4
Q:1/4=100
M:3/4
K:C
['e f']  
X:1
L:1/4
Q:1/4=100
M:3/4
K:C
 G | e f g | e2 c/B/ | A B c | G2 c | A B c | A B c | d2 G | e f g | e2 d | c d e | G2 e | f e d | 
 c d e | c2 G | e2 g | c2 e | d2 f | A2 c | B A G | c2 d | e2 G | e f g | e2 c/B/ | A (B) (c) | 
 G2 z | f e d | c d e | c2 ||  