Construct a piece of music using the designated motif as the basis, while ensuring the required form is followed.
X:1
L:1/16
M:2/4
K:G
['B2Bc dedc', 'gfga gdBd gfga'  
X:1
L:1/16
M:2/4
K:G
 B2Bc dedc | B2Bc dedc | B2G2 GABG | A2D2 D2dc | B2Bc dedc | B2Bc dedc | BdGB | AcFA | GFGA G4 :| 
 gfga gdBd | gfga gdBd | gfga b2g2 | fefg afed | edef gece | dcde dBGB | AGAB cAFA | GFGA G4 :|  