Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/16
M:2/4
K:D
['', 'fded fdef', 'BdAd f2ed f2ed |1 cABc d2Ad :|2', 'dcdA FAFA', 'FAFA GDB,D FAFA dcdA FAFA GABc']  
X:1
L:1/16
M:2/4
K:D
 ag"A" |: fded fdef | gbaf e2ag | fded fdef |1 gbaf d2ag :|2 gbaf d2Ad ||"B" |: f2ed fded | 
 BdAd BdAd | f2ed f2ed |1 cABc d2Ad :|2 cABc dABc ||"C" | dcdA FAFA | GBGB FAFA | dcdA FAFA | 
 GABc d2(3ABc | dcdA FAFA | GDB,D FAFA | dcdA FAFA | GABc d2 |]  