Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/8
Q:1/8=180
M:6/8
K:D
['fed fga fed AFD FAd', 'fdd fdd']  
X:1
L:1/8
Q:1/8=180
M:6/8
K:D
|: a/g/ | fed fga | fed AFD | FAd def | fee eag | fed fga | fed AFD | FAd efg | fdd d2 :: a/g/ | 
 fdd fdd | fdd fga | e=cc ecc | e=cc efg | fdd fdd | fdd fga | bc'd' afd | edd d2 :|  