Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
Q:1/4=120
M:4/4
K:A
['e<c B>c', 'a2 A>B']  
X:1
L:1/8
Q:1/4=120
M:4/4
K:A
 c>d | e<c B>c A2 C>A | F<A E>C E2 A>B | c<e d>a e<c A>A | c2 B2 B2 c>d | e<c B>c A2 C>A | 
 F<A E>C E2 A>B | c<e d>a e<c B>c | A>a e>c A2 E2 || A>B c>d e<c a2 | A>B c>d e<c a2 | 
 A>B A>F E<C D>A | c>A c<e f2 a2 | A>B c>d e<c a2 | A>B c>d e<c a2 | A>B A>F E<C D>A | 
 c<e B>c A2 |]  