Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
M:2/4
K:F
["g>e c'>g a>f", 'z f e>g =B>d c>d e>f g>a']  
X:1
L:1/8
M:2/4
K:F
 c | f>c a>d | f>c A>c | f>c a>f | g>e c'>g | a>f c'>a | g>e c'>g | a>f d>=B | c2 z :: f | 
 e>g =B>d | c>d e>f | g>a _b>g | a>e f>g | a>e f>c | d>A B>G | A>c E>G | F2 z :|  