Develop a musical composition that includes the supplied motif while following the designated alphabetical pattern.
X:1
L:1/8
M:6/8
K:Gmix
['B2 c dBG', 'AGA FAc fed cAF']  
X:1
L:1/8
M:6/8
K:Gmix
 GFD B2 c | dBG GFD | G2 A B2 c | dBG G2 B | GFD B2 c | dBG AGA | FAc fed |1 cAF FGA :|2 
 cAF F2 c || dfd cec | BdB{B} AGF | G2 A B2 c | dBG G2 c |1 dfd cec | BdB AGA | FAc fed | 
 cAF FAc :|2 dBd fed | cdB AGA | FAc fed | cAF FGA |]  