Draw Checkerboard on Python

[Loulou_1]

I want to draw a checkerboard on Python, but I only get one black square.
Can you help me fix this program?

import turtle

def filled_square(size, color, x, y):
    turtle.setpos(x, y)
    turtle.color(color)
    turtle.begin_fill()
    for i in range(4):
        angle = 90
        turtle.fd(size)
        turtle.lt(angle)
    turtle.end_fill()
    turtle.up()

import sys
n = int(sys.argv[1])
s = int(sys.argv[2])

square_size = s//n
y=0

for i in range(n):
    x = 0
    for j in range(n):
        if (i+j)%2==0:
            filled_square(square_size, "red", x, y)
        else:
            filled_square(square_size, "black", x, y)
    x+=square_size
    turtle.down()

turtle.done()

[Abdikadir]

please could you help this question

pythan ask for name and exam score(1-100) of a student and tell if student failed (scored less than 40)

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ask for price of two items you are buying from Amazon and tell if it qualifies for free shipping if yu buy for items more than $30, you qualify for free shipping.

[happygeek]

@Abdikadir

Firstly, it's not good form to hijack someone else's question to ask your own unrelated one (or even a related one for that matter)

Secondly, it's even worse form and against the rules here at DaniWeb to post a homework assignment and expect people to just do your work for you. The rules state: 'provide evidence of having done some work yourself if posting questions from school or work assignments'

So here's your answer: start a new thread to ask your question, and in it show us your code (or pseudo-code) and explain exactly where you are getting stuck and what help you are looking for.