Construct a musical composition following the designated musical form and incorporating the given motif.
X:1
L:1/8
Q:1/2=100
M:2/4
K:F
['c2 A>B c2', 'c>c c2'  
X:1
L:1/8
Q:1/2=100
M:2/4
K:F
 A>B |"_No key sig. in MS" c2 A>B | c2 A>B | c2 a>g | f2 c>c | c2 b>a | g2 a>g | f2 :: c>c | 
 c2 (g>f) | e2 c>c | c2 a>g | f2 c>c | c2 (g>f) | e2 c>c | c2 a>g | f2 A>B | c2 A>B | c2 A>B | 
 c2 a>g | f2 c>c | c2 b>a | g2 a>g | f2 :|  