Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/4
M:3/4
K:F
['c/f/ a ^g a f e e/f/']  
X:1
L:1/4
M:3/4
K:F
 c/f/ | a ^g a | f e e/f/ | g ^f g | d2 a/a/ | a g f | e2 d | c3- | c2 |]  