Design musical compositions that conform to the indicated framework and encompass the proposed musical concept.
X:1
L:1/8
Q:1/2=100
M:2/2
K:Bb
['B,2 B2', 'F2 f2'  
X:1
L:1/8
Q:1/2=100
M:2/2
K:Bb
 B,2 B2 ABcA | B,2 B2 B3 c | d2 B2 ABcA | F2 e2 e3 f | g2 e2 cdec | f2 d2 BcdB | e2 c2 ABcA | 
 !fermata!B4 B,4 :: F2 f2 =efge | f2 F2 F4 | F2 f2 cd_ec | d2 F2 F4 | f2 d2 gabg | =e2 c2 fgaf | 
 b2 g2 =efge | f4 F3 F!D.C.! :|  