Develop a musical piece using the given motif and adhere to the outlined structure.
X:1
L:1/8
M:6/8
K:A
['fBB a3 faf ecB', 'Bce f2 b baf b3 baf a3'  
X:1
L:1/8
M:6/8
K:A
 fBB a3 | faf ecB | A3 cAc | efg aga | fBB a3 | faf ecB | Ace aga | fec Bce :: f2 b baf | b3 baf | 
 a3 aec | Ace aga | fbb fbb | eaa eaa | fec a2 a | fec B3 :|  