Form a musical piece based on the provided motif while observing the defined structure.
X:1
L:1/8
Q:1/8=200
M:4/4
K:D
['fBBb fBde', 'eAce fBdB fBde', 'eAce fbbb fBde'  
X:1
L:1/8
Q:1/8=200
M:4/4
K:D
 fBBb fBde | fBBb eAce | fBBb fBde | fgaf eAce :: fBdB fBde | fBdB eAce | fBdB fBde | fgaf eAce :: 
 fbbb fBde | faaa eAce | fbbb fBde | fgaf eAce :|  