Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/8
M:2/4
K:none
['DD/D/ ED', 'Bd g>f eg c2 ed cd |1'  
X:1
L:1/8
M:2/4
K:none
[K:G] DD/D/ ED | DG B2 | DB DB | d"_c"c AF | DD/D/ ED | DF A2 |1 D"_c"c Dc | ed BG :|2 DF/A/ dF | 
 GB G z |: d"_c"c/d/ ed | g>d Bd | g>f eg | fd"_c" c2 | d"_c"c/d/ ed | f>d"_c" cd |1 f>d ef | 
 ga b2 :|2 ed ef | gg g z |]  