Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:4/4
K:Bmin
['FB B2 FBdB f3 e', 'B2 FB B2 Bcde f3 e']  
X:1
L:1/8
M:4/4
K:Bmin
|: FBdB FB B2 | FBdB f3 e | ABcA EA A2 | fAeA fedc | BcdB FB B2 | FBdB f3 e | fB B2 cA A2 | 
 faec dB B2 :: dB B2 FB B2 | Bcde f3 e | cA A2 eA A2 | cdef e2 fe | fB B2 FB B2 | Bcde f3 e | 
 fB B2 cA A2 | fdec dB B2 :|  