Compose a musical piece by integrating the alphabetic representation of the specified sequence and the provided motif.
X:1
L:1/8
M:6/8
K:C
['C CEG']  
X:1
L:1/8
M:6/8
K:C
 C | CEG GAG | FEF C2S G | ABc dcA | G3- G2S E |"^(a)" GAB c2 E |"^(b)" FGA G2S C | CEG GFD | 
 C3- C2 |]  