Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:6/8
K:A
['B2 A AcB cAB']  
X:1
L:1/8
M:6/8
K:A
 E |"A" AcB Bce | fec"E7" B2 A |"A" AcB cAB |"F#m" cAF"D" F2 E |"A" AcB Bce | fec"E7" B2 A | 
"A" AcB cAB |"E7" cAA"A" A2 :: a |"D" f3 fea | fea fec |"A" ecf ecf | ecA"E7" B2 e | 
"F#m" aff"E" gee |"D" fec"E7" B2 A |"A" AcB cAB |"E7" cAA"A" A2 :|  