Fill area of chart using matplotlib in python

import as plt y = [1,2,3,4,5,6] x = [1,2,1,2,3,2] x1 = [0,1,0,1,2,1] x2 = [2,3,2,3,4,3] (x,y) (y,x1,x2, color=“lightblue“, alpha=0.5) (2,3, color=“red“, alpha=0.2) (3,5, color=“green“, alpha=0.2) ()