Construct a melodic piece using the alphabet-based musical sequence and the given motif.
X:1
L:1/8
M:4/4
K:Bb
['gfed BAGF d2 B2']  
X:1
L:1/8
M:4/4
K:Bb
 BA |"Bb" B2 B,2 B,2 FE |"Bb" DF B2 B2 dB |"F" c2 C2 C2 cB |"F" Ac f2 f2 ga |"Bb" bagf"Eb" gfed | 
"Eb" edcB"Bb" BAGF |"Eb" GB"F"Ac"Bb" Bd"F"ce |"Bb" d2 B2 B2 | |: FE |"Bb" DFBF DFBF | 
"Eb" G2 E2 E2 GF |"C" =EGcG EGcG |"F" A2 F2 F2 GA |"Bb" B2 f2"Eb" gfed |"Eb" edcB"Bb" BAGF | 
"Eb" GB"F"Ac"Bb" Bd"F"ce |"Bb" d2 B2 B2 :|  