Develop a musical composition that includes the supplied motif while following the designated alphabetical pattern.
X:1
L:1/8
M:4/4
K:D
['(3BcB AB', 'a2 fd ad (3ddd']  
X:1
L:1/8
M:4/4
K:D
|: (3BcB AB dBAc | BFAF EFGA | (3BcB AB dBAB | a3 g fd d2 :: a2 fd ad (3ddd | adfd Beef |1 
 a2 fd ad (3ddd | gbag fd d2 :|2 a3 e fedB | ABde fd d2 ||  