Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
M:6/8
K:F
['a2 g fed c2 A c2 f', 'g3 f3 ege c3 =BdB GAB']  
X:1
L:1/8
M:6/8
K:F
 a2 g fed | c2 A c2 f | ege cde | fef a3 | a2 g fed | c2 A c2 f | ege cde | f6 :: g3 f3 | ege c3 | 
 =BdB GAB | c=Bc g3 | g3 f3 | ege c3 | =BdB GAB | c6 :|  