Develop a musical composition based on the provided pattern of letters and incorporating the given motif within it.
X:1
L:1/8
M:2/2
K:A
['ABcA BFAF E3 F Aceg a3 e', 'A4 E2 GE BEGE A2 cA eAcA']  
X:1
L:1/8
M:2/2
K:A
|: ABcA BFAF | E3 F Aceg | a3 e faec | dBcA BAFG | ABcA BFAF | E3 F Aceg | a3 e faec | dBGB A4 :: 
 E2 GE BEGE | A2 cA eAcA | B2 ^dB fBdB | e2 ge bege | a3 e fecA | defg a2 ga | bgaf gece | 
 dBGB A4 :|  