Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/16
M:2/4
K:Bb
['d2f2 f2f2 e2g2 g2fe dfdB cecA', 'b2BB Bcde f2fe f4 edcB ABcA'  
X:1
L:1/16
M:2/4
K:Bb
 fe | d2f2 f2f2 | e2g2 g2fe | dfdB cecA | B2b2 b2fe | d2f2 f2f2 | e2g2 g2fe | dfdB cecA | 
 B2B2 B2 :: f2 | b2BB Bcde | f2fe f4 | edcB ABcA | Bcde f4 | b2BB Bcde | f2fe f4 | edcB ABcA | 
 B2d2 B2 :|  