Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/8
M:12/8
K:D
['A2 D FED F2 A A2 f', 'f3 gfe'  
X:1
L:1/8
M:12/8
K:D
 B | A2 D FED F2 A A2 f | g2 e f2 d e2 d Bcd | A2 D FED F2 A A2 f | a2 f efe d3 d2 :| A | 
 d2 e f3 gfe f3 | gfe f2 d e2 d BAB | d2 e f3 gfe f2 g | a2 f efe d3 d2 :|  