Develop a musical composition that includes the supplied motif while following the designated alphabetical pattern.
X:1
L:1/8
M:4/4
K:Gmix
['FDEF D2 de fdec dcAB c2 dc', 'agfe d2 ad bdad Adfa bafd c2']  
X:1
L:1/8
M:4/4
K:Gmix
 FDEF D2 de | fdec dcAB | c2 dc BG G2 | EDCD EAGE | FDEF D2 de | fdec dcAB | c2 dc BG G2 |1 
 EDCE DBAG :|2 EDCE DGAB |: c2 ge aege | Gceg agfe | d2 ad bdad | Adfa bafd | c2 ge aege | 
 afge defg | afge fded |1 c2 dc BABB :|2 c3 d cBAG ||  