Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/8
M:2/4
K:G
['dBdB ec c2 cAcA BG G2 dBdB', 'G,2 DFAc DFAc cdcB B2 A2 dBdB'  
X:1
L:1/8
M:2/4
K:G
 dBdB | ec c2 | cAcA | BG G2 | dBdB | ecec | BAGF | G2 G,2 :: DFAc | DFAc | cdcB | B2 A2 | dBdB | 
 ecec | BAGF | G2 G,2 :|  