Produce a musical work that intertwines the supplied melodic theme and the indicated alphabetical pattern.
X:1
L:1/16
M:2/4
K:Bb
['b4 g2']  
X:1
L:1/16
M:2/4
K:Bb
 f2 f4 g2 | b2fd c4- | c6 fd | d2dc b4 | g2 f6- | f8 | b2bdcdb2 | g6 b2 | f2 b4 gb | g2 f6 | 
 dc d4 f2 | gf g4 fd | cd b4 g2 | g8 | b2bdcdb2- | b6 g2 | d2 b4 dg | f8- | f8 |]  