Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/4
Q:1/8=110
M:2/2
K:Dmix
['a a f g', 'f e A d e']  
X:1
L:1/4
Q:1/8=110
M:2/2
K:Dmix
 a | a f g a | f3/2 e/ d a | a f g a | f3 || f | e A d e | f3/2 e/ d f | e A d e | f3 f | e A d e | 
 f3/2 e/ d a | a f g a | f3 ||  