Construct a piece of music using the designated motif as the basis, while ensuring the required form is followed.
X:1
L:1/8
M:4/4
K:Dmix
['Bd e2', 'b2 gb'  
X:1
L:1/8
M:4/4
K:Dmix
|: BGAG EGDG | EGDG EGDE | G2 Bd e2 df | e2 dg edBA | G2 GA B2 Bd | e2 ed efga | bgag egge | 
 dBAc BG G2 :: b2 gb a2 ga | b2 gb aged | G2 Bd e2 dg | e2 dg edBA | G2 GA B2 Bd | e2 ed efga | 
 bgag egge | d2 Ac BG G2 :|  