Develop a musical composition using the alphabetic representation of the specified sequence and incorporating the given motif.
X:1
L:1/8
M:4/4
K:A
['c2 B2']  
X:1
L:1/8
M:4/4
K:A
 A2 | d3 d c2 B2 | c2 AG F2 z c | d2 BG A2 BG | E4 EFGE | A3 F G2 A2 |"^(a)" B4 c2 e2 | 
 d2 c2 B2 B2 | A6 |]  