Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:4/4
K:D
['F>A d>f e/d/c/B/', 'B<dA<d f<dc<d']  
X:1
L:1/8
M:4/4
K:D
 G | F>A d>f e/d/c/B/ A>c |{c} d>A G/F/E/D/ C<EE>G | F>A d>f e/d/c/B/ A>g | 
 (3f/e3/2d (3c/d3/2e f<dd :| g | f>dc<d B<dA<d | f<dc<d e<[CE][CE]>g | f>dc<d B<dA>g | 
 (3fed (3cde f<dd>g | f>de/c<d B<dA<d | f<dc<d e<[CE][CE]>G | F<DF<A B<G B>g | (3fed (3cde f<dd ||  