Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:3/4
K:C
["e>f g2 c'2 c'e' g>a fg cd", 'B>c de fe c>c ec/e/ g2']  
X:1
L:1/8
M:3/4
K:C
 e>f g2 c'2 | c'e' g>a fg | cd ec g(e{fe)} | d/e/d c4 :: B>c de fe | c>c ec/e/ g2 | B>c de fe | 
 c>c ec/e/ g2 | ff ef g(e{fe)} | d/e/d c4 :|  