Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
M:4/4
K:A
['(d<f) f2', 'A2 e>dc>a (f<d) d2 f>e^d>b (g>e) e2']  
X:1
L:1/8
M:4/4
K:A
|: ve>vduc>uA (d<f) f2 | e>dc>A F<B G<E | e>dc>A (d<f) f2 | (ef/g/) a>c B2 A2 :: e>dc>a (f<d) d2 | 
 f>e^d>b (g>e) e2 | e>dc>a (3fed (3cBA |1 (3GAB E>B (3Afe (3dcB :|2 (3GAB E>d (c<A) A2 |]  