Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/16
M:2/4
K:G
['FGAB cBcd', 'B2Bd A6 FG A2Ad B2Bd A2F2 F2d2'  
X:1
L:1/16
M:2/4
K:G
 FGAB cBcd | c2B2 B2G2 | FGAB cBcd | B6 G2 | FGAB cBcd | c2B2 B2G2 | A2AB AGFE |1 D6 G2 :|2 
 D6 FG |:[K:D] A2Ad B2Bd | A2FF FDFG | A2Ad B2Bd | A6 FG | A2Ad B2Bd | A2F2 F2d2 |1 cdcB ABAG | 
 FGFE D2FG :|2 cd^cB A2Bc | d8 |]  