Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
M:4/4
K:D
['f2 f2', '(3aaa b>a f2 d2']  
X:1
L:1/8
M:4/4
K:D
 (3AAA A>d f2 f2 | (3AAA Ad f2 f2 | g>f e>d c3 d | (3efe (3dcB (3ABA F2 | (3AAA A>d f2 f2 | 
 (3AAA Ad f2 f2 | g>f e>d c3 d | (3efe dc d3 B :| (3aaa b>a f2 d2 | (3aaa b>a f2 d2 | 
 g>f e>d c3 d | (3efe (3dcB A2 A2 | (3aaa b>a f2 d2 | (3aaa b>a f2 d2 | g>f e>d c3 d | 
 (3efe d>c d2 d2 :|  