Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
M:4/4
K:D
['B<d A<F A2 d>e', 'd>ef>g a>f']  
X:1
L:1/8
M:4/4
K:D
 f>g | (a<f)(e>f) d2 f<d | B<d A<F A2 d>e | f<a b<d' a<f d>f | (f2 e2) z2 f>g | a<fe>f d2 fd | 
 B<d A<F A2 d>e | f<ab<d' a<fef | d4 z4 |: d>ef>g a>f d'2 | d>ef>g a>f d'3 d | d>edB AFAd | 
 fdfa bd'/4c'/4b/4c'/4d' b | a<f f<d B<d A<d | f<a e>f d2 :|  