Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:2/4
K:Bmin
['', 'B>d cA Bd f>g ag fe', 'fd ee fe d2 df cB BA']  
X:1
L:1/8
M:2/4
K:Bmin
 f |: B>d cA | Bd f>g | ag fe | f/g/f/d/ BA | B>d cA | Bd f>g | ag fe | f2 fd :| ee fe | d2 df | 
 cB BA | Bd fd | ee fe | d2 df | cB BA |1 B3 d :|2 B4 ||  