Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:3/4
K:Amin
['A^c e2 c2 de{e} f2 d2 g2{/a}', 'c2 A>c (cB) B2', 'F2 D>F FE E2 ^CC']  
X:1
L:1/8
M:3/4
K:Amin
 A^c e2 c2 | de{e} f2 d2 | g2{/a} (3gfg a2 | fd e4 :: e2 (ef) (ed) | (dB) c2 A>c | (cB) B2 ^GG | 
 B2 AB cd | e2 (ef) (ed) | dB c2 A>c | (cB) B2 ^G2 | B>c A4 ::[K:Dmin] A2 AB AG | GE F2 D>F | 
 FE E2 ^CC | D2 (DE) (FG) | A2 (AB) AG | (GE) F2 D>F | FE E2 ^CC | EF D4 :|  