国际象棋棋盘

import turtle

n = 60
x = -300
y = -300


def main():
    turtle.speed(11)
    turtle.pensize(2)
    turtle.penup()
    for i in range(8):
        for j in range(8):
            turtle.goto(x + i * n, y + j * n)
            if (i + j) % 2 == 0:
                draw_square(n, "white")
            elif (i + j) % 2 == 1:
                draw_square(n, "black")
    x1 = x - n * 0.12
    y1 = y - n * 0.12
    n1 = n * 8 + 2 * n * 0.12
    turtle.goto(x1, y1)
    turtle.pensize(4)
    draw_square_2(n1)
    x2 = x - n * 0.3
    y2 = y - n * 0.3
    n2 = n * 8 + 2 * n * 0.3
    turtle.goto(x2, y2)
    turtle.pensize(10)
    draw_square_2(n2)
    turtle.hideturtle()
    turtle.done()


def draw_square(length: float, fill_color: str):
    turtle.pendown()
    turtle.begin_fill()
    turtle.fillcolor(fill_color)
    for index in range(4):
        turtle.forward(length)
        turtle.left(90)
    turtle.end_fill()
    turtle.penup()


def draw_square_2(length: float):
    turtle.pendown()
    for index in range(4):
        turtle.forward(length)
        turtle.left(90)
    turtle.penup()


if __name__ == '__main__':
    main()