Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
M:4/4
K:Bb
['D B,>DF>B d>Bc>A B<G F>D E<C C>D', 'D<B,B, F D>FB,>F D>FB,>F E>F G/F/E/D/ E<C']  
X:1
L:1/8
M:4/4
K:Bb
 D | B,>DF>B d>Bc>A | B<G F>D E<C C>D | B,>D FBc>A | B>GF>E D<B,B, :: F | D>FB,>F D>FB,>F | 
 E>F G/F/E/D/ E<C C>D | B,>DF>B d>Bc>A | B>GF>E D<B,B, :|  