Develop a musical composition that includes the supplied motif while following the designated alphabetical pattern.
X:1
L:1/8
M:2/2
K:D
['BFAF E2 eg fdec', 'fddc defd']  
X:1
L:1/8
M:2/2
K:D
 d3 A BFAF | E2 eg fdec | dcdA BGAF | GBAG FDDA | dcdA BFAF | E2 eg fdec | defd cdec | dBAG FDDe || 
 fddc defd | g3 a bgeg | fedc dfaf | g2 eg fdde | fddc defd | g2 ga bgef | g2 gf gaag | 
 faeg fdef ||  