Turtle Art to draw Chess

import turtle

screen = turtle.Screen()
screen.setup(width=420, height=420)
screen.bgcolor("white")

pen = turtle.Turtle()
pen.speed(0)
pen.width(2)

# Function to draw a single square
def draw_square(color, size, x, y):
    pen.penup()
    pen.goto(x, y)
    pen.pendown()
    pen.color(color)
    pen.begin_fill()
    for _ in range(4):
        pen.forward(size)
        pen.right(90)
    pen.end_fill()

# Function to draw the outer boundary
def draw_boundary(size, x, y):
    pen.penup()
    pen.goto(x, y)
    pen.pendown()
    pen.color("black")
    for _ in range(4):
        pen.forward(size)
        pen.right(90)

# Drawing the outer boundary
draw_boundary(320, -160, 120)
draw_boundary(360,-180,140)

# Drawing the checkerboard pattern within the outer boundary
size = 40  # Size of each square
num_rows = 8
num_cols = 8
for row in range(num_rows):
    for col in range(num_cols):
        if (row + col) % 2 == 0:
            draw_square("black", size, col * size - 160, row * size - 160)


# Hide the turtle and display the result
pen.hideturtle()
screen.mainloop()
#And its all done
#Hope it works