Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/16
M:2/4
K:G
['GABc dBGA B2BA', 'G2g2 efgd B2BA', 'GG gg eegg'  
X:1
L:1/16
M:2/4
K:G
 GABc dBGA | B2BA B2A2 | G2ABc dBGB | A2AB A2 z2 | GABc dBGA | B2BA B2d2 | e2>d2 efgd | 
 B2A2 G2 z2 :: G2g2 efgd | B2BA B2A2 | G2b2 efge | a2>b2 a4 | G2g2 efgd | B2BA B2d2 | e2>d2 efgd | 
 B2A2 G4 :: GG gg eegg | B2Bc B2A2 | GG gg eegg | a2>b2 a4 | GG gg eegg | B2BA B2d2 | e2>d2 efgd | 
 B2A2 G4 :|  