import turtle

def drawChessboard(startX, startY, width = 250, height = 250):
    turtle.speed(0)
    turtle.penup()
    # go to location specified by user
    turtle.goto(startX, startY)
    turtle.pendown()
    # Draw the red outline of the chessboard.
    turtle.color("red")
    for i in range(2):
        turtle.forward(width)
        turtle.left(90)
        turtle.forward(height)
        turtle.left(90)
    # Draw all of the black rectangles.
    drawAllRectangles(width, height, startX, startY)
    turtle.done()


def drawAllRectangles(width, height, startX, startY):
    # Draw first set of squares
    for n in range(4):
        for i in range(4):
            turtle.pendown()
            drawRectangle(width, height)
            turtle.penup()
            turtle.forward(width / 4)
        turtle.penup()
        turtle.setheading(180)
        turtle.forward(width)
        turtle.setheading(90)
        turtle.forward(height / 4)
        turtle.setheading(0)
    # Set up for the second set of squares.
    turtle.penup()
    turtle.goto(startX, startY)
    turtle.setheading(0)
    turtle.forward(width / 8)
    turtle.setheading(90)
    turtle.forward(height / 8)
    turtle.setheading(0)
    turtle.pendown()
    # Draw second set of squares
    for n in range(4):
        for i in range(4):
            turtle.pendown()
            drawRectangle(width, height)
            turtle.penup()
            turtle.forward(width / 4)
        turtle.penup()
        turtle.setheading(180)
        turtle.forward(width)
        turtle.setheading(90)
        turtle.forward(height / 4)
        turtle.setheading(0)
    # Draw individual rectangles
def drawRectangle(width, height):
    turtle.fillcolor("black")
    turtle.begin_fill()
    for i in range(2):
        turtle.forward(width / 8)
        turtle.left(90)
        turtle.forward(height / 8)
        turtle.left(90)
    turtle.end_fill()