Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
M:3/8
K:C
['f2 f e d2', 'f>df e d2 d/e/dB']  
X:1
L:1/8
M:3/8
K:C
 f2 f | e d2 | d/e/fe/f/ | gag | f2 f | e d2 | d/e/fe/f/ | g3 :: f>df | e d2 | d/e/dB | cde | 
 f>df | e d2 | d/e/dB | c3 :|  