Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/4
M:3/4
K:Bb
['d d/c/ d', 'g e e/d/ e']  
X:1
L:1/4
M:3/4
K:Bb
 f | d d/c/ d | c c/B/ c | B d e | f2 g | e e/d/ e | d d/c/ d | c/d/c/B/A/G/ | F2 f | d d/c/ d | 
 c c/B/ c | B d e | f2 g | e e/d/ g | F G A | B B/c/d/c/ | B2 :: B | g g/f/ g | e e/d/ e | c c c | 
 d2 B | e d c | b a g | f e d | c2 f | d d/c/ d | c c/B/ c | B d e | f2 g | e e/d/ e | F G A | 
 B B/c/d/c/ | B2 :|  