Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:4/4
K:A
['e>Ac<A c/d/e{/g}', 'a>e{/g}f>e (3fga (3gab']  
X:1
L:1/8
M:4/4
K:A
 f | e>Ac<A c/d/e{/g} f2 | e>A f/e/d/c/{/c} B2 B<f | e>Ac<A c/d/e{/g} a2 | e<Ac>B{/B} A2 A :| g | 
 a>e{/g}f>e (3fga (3gab | a/g/f/e/ a<c{/c} B2 (Bg) | a>e{/g}f>e (3fga (3gab | 
 (3agf (3efg a2 (ef/g/) | a>f{/a}g>e{/g} f>d{/f}e>c | d<bc<a B3 d | c/d/e Tf2 c/d/e Ta2 | 
 e<A{/d}c>B{/B} A2 A |]  