Develop a musical composition based on the provided pattern of letters and incorporating the given motif within it.
X:1
L:1/8
M:4/4
K:A
['EAAE GA', 'ec dged cABc']  
X:1
L:1/8
M:4/4
K:A
 EAAE GA B2 | Aced cAAF | EAAE GA B2- | BBBd cAAF | E3 A GA B2 | Aced cAAF | EAAE GA B2 |1 
 BABd cA A2 :|2 BABd cAAA Aceg |: [Aa]3 [aA]3 aga | bAaA g2 ec | dged cABc | defg agfg | 
 [Aa]3 [aA]3 aga | bAaA g2 ec | dged cABc |1 dcBc BAce :|2 dcBc BAAF ||  