Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/4
M:4/4
K:D
['B F F B']  
X:1
L:1/4
M:4/4
K:D
 B F F B | B d B2 | B F F B | B2 F/4A/4 F3/2 | B F F B | B d B2 | B F F B | B2 F/4A/4 F3/2 |]  