Using the given motif as a foundation, craft a musical piece adhering to the outlined form.
X:1
L:1/8
Q:1/4=132
M:6/8
K:Bb
['_A2 c B_AG FG=A B2']  
X:1
L:1/8
Q:1/4=132
M:6/8
K:Bb
 z3 z2 B | F>GF F<FG | _A>B_A _A2 c | B_AG FG=A | B2 B B2 c | d2 d def | fed c2 d/>e/ | f2 f edc | 
 B2 z c2 A | F>GF F2 G | _A2 _A _A2 c | B_AG FG=A | B2 c d2 B/c/ | d2 d d2 f | e2 d c2 d/e/ | 
 f2 f edc | B3 B2 |]  