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
['FDFA d2 (ef) gfed c2 A2', 'c2 A2']  
X:1
L:1/8
M:2/2
K:D
 (AG) | FDFA d2 (ef) | gfed c2 A2 | BAGB AGFA | G2 E2 E2 AG | FDFA d2 (ef) | gfed c2 A2 | 
 defd efge | f2 d2 d2 :: (fg) | agfe dcBA | B2 G2 G2 (ga) | bagf edcB | c2 A2 A2 (AG) | 
 FDFA d2 (ef) | gfed c2 A2 | defd efge | f2 d2 d2 :|  