Develop a piece of music by incorporating the provided motif and following the outlined musical structure represented by alphabet characters.
X:1
L:1/8
M:2/4
K:Bb
['df ff eg gf/e/ d/f/d/B/ c/e/c/A/', 'b2 BB Bcde ffef e/d/c/B/ A/B/c/A/']  
X:1
L:1/8
M:2/4
K:Bb
 f/e/ | df ff | eg gf/e/ | d/f/d/B/ c/e/c/A/ | Bb bf/e/ | df ff | eg gf/e/ | d/f/d/B/ c/e/c/A/ | 
 BB B :: f | b2 BB | Bcde | ffef | e/d/c/B/ A/B/c/A/ | B/c/d/e/ f2 | b2 BB | Bcde | ffef | 
 e/d/c/B/ A/B/c/A/ | Bd B :|  