Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/8
M:2/4
K:G
['D GGGG G2 GG', 'A3 B BABc dddd edcB c2 cd'  
X:1
L:1/8
M:2/4
K:G
 D | GGGG | G2 GG | AGFE | D3 D | GGGG | G2 GG | ABcB | A3 :: B | BABc | dddd | edcB | c2 cd | 
 edcB | cB AG | dGFE | D2 DD | EFGE | AF D2 | d3 c | B3 A | G3 :|  