Develop musical pieces that conform to the specified format and include the suggested musical theme.
X:1
L:1/8
M:4/4
K:G
['BcdB c2', 'B2 G2'  
X:1
L:1/8
M:4/4
K:G
 BcdB c2 c2 | BcdB A2 A2 | BcdB c2 Bc | d2 d2 G4 :: B2 G2 c4 | B2 G2 A4 | BcdB c2 Bc | d2 d2 G4 :|  