Create musical compositions adhering to the given structure and incorporating the provided musical concept.
X:1
L:1/8
Q:1/2=90
M:4/4
K:Bb
['F2 BABc B2 c2 d2 B4 c2', 'AB c2'  
X:1
L:1/8
Q:1/2=90
M:4/4
K:Bb
 F2 | BABc B2 c2 | d2 B4 c2 | de f2 f2 ed | c6 f2 | gfga g2 a2 | b2 f2- f2 ba | gfed c3 B | B6 :: 
 AB | cBcd c2 f2 | c2 AB c2 fe | dcBA G2 AB | A2 GF f3 f | d2 g2 =e3 f | gfga g2 a2 | b2 a2 bagf | 
 f6 ba | g2 e2 g2 ag | f2 d2 f2 gf | e2 c2 A2 fe | d4 B2 F2 | GA B2 AB c2 | Bc d2 cd e2 | 
 d2 (cB) (Bc)(BA) | B6 :|  