Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/8
M:2/2
K:D
['A,2 D2 DFEF', 'D2 de f a2 b afde fgab'  
X:1
L:1/8
M:2/2
K:D
 DB, | A,2 D2 DFEF | DEFA B2 A2 | dBAd BAFG | AFDF EDB,G, | A,2 D2 DFEF | DFAd B2 A2 | dBAd BFAB | 
 AFEF D2 :: de | f a2 b afde | fgab a2 af | gbef geag | fedf edBA | ([FA-] [AA]2) B AFAB | 
 A2 d2 fafe | dBAd BAFB | AFEF D2 :|  