Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/4
M:4/4
K:Db
['B B']  
X:1
L:1/4
M:4/4
K:Db
 B | B B B B | c d A A | F D E F | G G E F | F E E E3/2 | B/ B B B B | c d A2 | F D2 F | G2 E F2 | 
 D E E3/2 E/ | E2 F G | G A B2 | B e2 B/B/ | =B2 B A2 | _B B3 | z2 B e | e e d2 | B =B2 B | 
 _B2 E/E/ G | G E F F | D E B B | B B B B3/2 | =B/ d _B3/2 =B/ d | A2 F D3 | E/E/ E/E/ F/D/ E2 | 
 B B B B | B c d A2 | F D3 | G/G/ G/E/ F/F/ D | E3/2 B/ B |]  