Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:6/8
K:Amin
['A2 B c2 d', 'B c2']  
X:1
L:1/8
M:6/8
K:Amin
 E | A2 B c2 d | ecA ecA | G2 A B2 c | ded dBG | A2 B c2 d | efe dcB | A2 z a2 :| A | EAA A2 B | 
 c2 B c2 A | (G3 G2) E | (G3 G2) A | EAA A2 B | c2 B c2 d | (e3 e2) c | (e3 e2) c | e2 e edc | 
 d2 d d2 B | c2 c cBA | B2 B Bcd | e3 d3 | c3 B3 | EAA A2 ^G | A2 z a2 ||  