Construct a musical composition using the provided motif and maintain the designated form.
X:1
L:1/8
Q:3/8=100
M:6/8
K:Bb
['Tc2 B']  
X:1
L:1/8
Q:3/8=100
M:6/8
K:Bb
 fbB Tc2 B | fbB Tc2 B | fbf gbg | fdb Tc2 B | fbB Tc2 B | fbB Tg2 f | =edc fga | gf=e f3 |:  