Develop musical pieces that conform to the specified format and include the suggested musical theme.
X:1
L:1/8
M:4/4
K:C
['B2 AG', 'BGG B DGBG AGBG DGBG cAAB cdef'  
X:1
L:1/8
M:4/4
K:C
[M:2/4][K:G] Pa e ud f | g2 dc | B2 AG | FGAB | cAAf | (g/f/e/f/) gd | B2 AG | FGAc | BGG :: B | 
 DGBG | AGBG | DGBG | cAAB | cdef | gdcB | cAdc | BGG :|  