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:Amin
['', 'E2 A2 (A^G) ABcd (e^d)ef ec A2', 'G2 c2 (cB) cdef (g^f)ga ge c2']  
X:1
L:1/8
M:2/2
K:Amin
 E2 |: A2 (A^G) ABcd | (e^d)ef ec A2 | BABc edcB | A^GAc BG E2 | A2 (A^G) ABcd | (e^d)ef ec A2 | 
 dfed cB(A^G) | A2 a2 A2 :| G2 | c2 (cB) cdef | (g^f)ga ge c2 | dcde gfed | 
 (cB)ce dB G2 c2 (cB) cdef | (g^f)ga ge c2 | dfed cBAB | d2 c2 c2 ||  