Form a musical piece based on the provided motif while observing the defined structure.
X:1
L:1/8
M:4/4
K:Bb
['B2 B,2 (3dcB (3AGF E2 g2 g2', 'B,>DF>B d>fb>a'  
X:1
L:1/8
M:4/4
K:Bb
{c} B>A | B2 B,2 (3dcB (3AGF | E2 g2 g2 f>e | d>fB>d c>eA>c | B>ba>g f>ed>c | B2 B,2 (3dcB (3AGF | 
 E2 g2 g2 f>e | d>fB>d c>eA>c |{c} BABc B2 :: DC | B,>DF>B d>fb>a |{a} g>^fg>a g2 C>B, | 
 A,>CF>A c>fa>g | f>=ef>g f2 D>C | B,>DF>B d>fb>a | g>^fg>a g>de>=e |{g} f>ef>g f>ec>A | 
{c} B>AB>c B2 :|  