Develop musical pieces that conform to the specified format and include the suggested musical theme.
X:1
L:1/8
M:2/4
K:Bb
['F BFBc d3 B dddf e>dce ddcB']  
X:1
L:1/8
M:2/4
K:Bb
 F | BFBc | d3 B | dddf | e>dce | ddcB | c2 z c | ccdB | A>Bcc | ccdB | A>Bcf | ddcc | B2 z |]  