Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/4
Q:1/2=100
M:2/2
K:F
['c f', 'e a']  
X:1
L:1/4
Q:1/2=100
M:2/2
K:F
 c | f e/d/ c f | d3 c | d c B A | G2 F c | f e/d/ c f | d3 g | e d/c/ c3/2 =B/ | c3 :| G | 
 G c c B/c/ | A3 f | e3/2 f/ g/f/e/d/ | ^c3 e | a g/f/ e a | f3 f | g f/e/ d g | e3S e | 
 f e/d/ c f | d g e c | f g/a/ f3/2 e/ |!D.S.! f3 |]  