Using the provided alphabet sequence and motif, develop a unique musical composition.
X:1
L:1/8
M:4/4
K:Amix
['ABca g3 a bagf', 'b3 a']  
X:1
L:1/8
M:4/4
K:Amix
 c3 B ABca | g3 a bagf | e3 f edcA | BcdB f2 e2 | cdcB ABca | g3 a bagf | eABd cFGB |1 
 EAAG A3 B :|2 EAAG ABce |: b3 a bgeg | b3 a bgaf | e3 f edcA | BcdB f2 e2 | b3 a gega | 
 b3 a bgaf | eABd cFGB |1 EAAG ABce :|2 EAAG A4 ||  