Construct a melodic piece using the alphabet-based musical sequence and the given motif.
X:1
L:1/8
M:4/4
K:D
['B2 dB', 'e2 ef']  
X:1
L:1/8
M:4/4
K:D
 B2 dB BAFA | B2 dB BAFB | AF (3FFF DF (3FFF | AFdB ADFA | B2 dB BAFA | B2 dB BAFB | A3 B defd |1 
 edef d3 A :|2 edef d3 f || e2 ef d2 df | edef dB A2 | e2 ef dcde | fedB ADFA | e2 ef dB (3BBB | 
 gB (3BBB defg | afbf afeg | fedB ADFA :|  