turtle画带格子的框图

import turtle 
import time
turtle.pensize(1)
turtle.screensize(400,400)

turtle.begin_fill()
def cursorxy(event):
    x=event.x- 240
    y=180-event.y
    return turtle.title(str(x)+','+str(y))
def kuang(x,y):
      
      turtle.fillcolor("red") 
      turtle.penup()
      turtle.home()
      turtle.goto(x*20,y*20)
      turtle.pendown()
      turtle.left(180)
      turtle.forward(20)
      turtle.left(90)
      turtle.forward(20)
      turtle.left(90)
      turtle.forward(20)
      turtle.left(90)
      turtle.forward(20)
turtle.speed(10)
for i in range(2):
     for j in range(2):
          kuang(i,j)