Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/16
M:2/4
K:Bmin
['f2B2 Bcde f2F2', 'B2 A2 d2>c2 defg a2f2 d2>d2 e2e2']  
X:1
L:1/16
M:2/4
K:Bmin
 A2 | f2B2 Bcde | f2F2 f2>f2 | e2A2 ABcd | efed e2de | f2B2 Bcde | f2F2 f4 | f2b2 fgfe | d2B2 B2 :: 
 A2 | d2>c2 defg | a2f2 d2>d2 | e2e2 efed2 | cAce a4 | B2B2 Bcde | f2F2 f4 | f2b2 fgfe | 
 d2B2 B2 z2 :|  