Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/4
M:4/4
K:Bb
['z z']  
X:1
L:1/4
M:4/4
K:Bb
"Bb" D2 D D | D2 D D |"F" F2 E E |"Bb" D2 D2 |"Gm" B2 B B |"Am" A2"Bb" G F |"C7" F2 =E2 | 
"F" F2 F2 ::"F" z2"Eb" z z |"Dm" z2"Cm" z z |"Bb" B2"Bb7" ^G G |"Eb" =G2"Bb/D" F2 |"Cm" E2"F" F2 | 
"Bb" D2"Bb/D" F F |"Eb" G A B"F" c |"Bb" d2"Gm" c B |"Cm/Eb" B2"F7" A2 |"Bb" B2 B2 :| z2 B B | 
 d2"Bb/D" B2 | z2 F F |"Eb" G4 |"Bb" F4 |]  