Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/16
M:2/2
K:Bb
['B4 c4 dfdB AcAF .E2.g2', 'B2 fg/a/ b2f2 (ed)(cB) (bf)ed (ed)cB e2g2']  
X:1
L:1/16
M:2/2
K:Bb
 B,2 | B4 c4 dfdB AcAF | .E2.g2 .D2.f2 C2(ec) dBAF | B4 c4 dfdB AcAF | .E2.g2 .B2.b2 dBcA B2 :| 
 fg/a/ | b2f2 (ed)(cB) (bf)ed (ed)cB | e2g2 G2c2 (ec)dB (BA)GF | .E2.g2 .D2.f2 C2(ec) (dB)(AF) | 
 (bf)dB (ec)dB FBAc B2 ||  