Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/8
M:2/2
K:D
['D2 DE FEDE ([FA-]2 [AA]2) [AA]2', 'E2 E2'  
X:1
L:1/8
M:2/2
K:D
 D2- | D2 DE FEDE | ([FA-]2 [AA]2) [AA]2 DE | FEDF (ED)DF | EDB,G, A,2 A,B, | D2 DE FEDE | 
 ([FA-]2 [AA]2) [AA]2 [AA]- | [AA]2 B2 dBAG |1 FDED D2 :|2[M:6/4] FDED D2 DD D2 |: (e2 | 
[M:2/2] f2) f2 f2 af | d2 fd B2 d2 | !slide!f2 fg a2 a(a | b)a f2 !slide![ee]2 A2 | f2 ed BA B2 | 
 dBAF E2 E2 | E2 AB cBAG |[M:6/4] FDED D2 DD D2 :|  