Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/8
Q:1/8=70
M:2/4
K:G
['B2 c2 d3 g f>d ef', 'fd e/d/e/f/ ge d3 d c/B/c/d/ ec'  
X:1
L:1/8
Q:1/8=70
M:2/4
K:G
 B2 c2 | d3 g | f>d ef | e2 d2 | B2 c2 | d3 g | f>d ef |1 g4 :|2 g3 d |: g2 ab | ag fd | 
 e/d/e/f/ ge | d3 d | c/B/c/d/ ec | B2 GB |1 AB cd | e4 :|2 AB/c/ de/f/ | g4 ||  