Craft a musical composition that adheres to the specified musical theme and letter-based structure.
X:1
L:1/8
Q:1/8=128
M:4/4
K:Amin
['C<E E2 A<c c>e d>c', 'c>d e<c a>g f>e d>c B>c d<f']  
X:1
L:1/8
Q:1/8=128
M:4/4
K:Amin
|: E2 | C<E E2 A<c c>e | d>c B<c B4 | C<E E2 A<c c>e | d>c B<c A2 E2 | C<E E2 A<c c>e | 
 d>c B<c B4 | C<E E2 A<c c>e | d>c B<c A2 :: c>d | e<c a>g f>e d>c | B>c d<f e2 e>d | 
 c<A A>c d>c B>A | ^G>A B<c d2 c>d | e<c a>g f>e d>c | B>c d<f e2 e>d | c<A A2 B>c d<B | 
 e<c B>c A2 :|  