Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/8
Q:1/8=180
M:2/2
K:A
['A2 cA', 'feae feae', '(3Bcd cA'  
X:1
L:1/8
Q:1/8=180
M:2/2
K:A
 A2 cA BAcB | A2 cA BAFE | A2 cA BABc | efed cBAG |"^5" A2 cA BAcB | A2 cA BAFE | 
 (3ded cA (3BcB AF | EFAc B2 Ae ||"^9" feae feae | feae dcBA | feae feae | efed cAAe | 
"^13" feae feae | feae dcBA | Ac (3efg abaf | efed ce a2 ||"^17" e3 f e3 f | e2 cA BAFE | 
 e3 f e2 cA | (3Bcd cA Bc (3efg |"^21" agfa gfeg | fedf ecAc | (3ded fd (3cdc ec | (3Bcd cA BAFE | 
"^final" A8 |]  