Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/8
M:6/8
K:C
['d2 B', 'fga gec Afe d2 g']  
X:1
L:1/8
M:6/8
K:C
|:{ef} g2 e c2 c |{Bc} d2 B G2 G | ABc def | ege d3 |{ef} g2 e c2 c |{Bc} d2 B G2 G | ABc def | 
 efd c2 ::{Bc} d2 B g2 d |{cd} e2 c g2 e | agf edc |{Bc} d2 B GAB | c2 e def | e2 g fga | gec Afe | 
 d2 g c3 :|  