Develop musical pieces that conform to the specified format and include the suggested musical theme.
X:1
L:1/8
M:4/4
K:Bmin
['f2 ef B2 fe', 'Bc BB Bc d2 cB'  
X:1
L:1/8
M:4/4
K:Bmin
 f2 ef B2 fe | faef cA Ac | f2 ef B2 fe | fa ec B2 Bc :: BB Bc d2 cB | AA AB cA Bc | BB Bc d2 cB | 
 f2 ec B2 B2 :|  