# Demo entry 6746016

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Submitted by anonymous on May 28, 2018 at 08:06
Language: Python 3. Code size: 2.4 kB.

```import turtle
import random
from random import randint
import math

def fillSquare(x,y,lineX,lineY,r,g,b):
turtle.penup()
turtle.setpos(x,y)
turtle.pendown()
turtle.color(r,g,b)
turtle.begin_fill()
turtle.forward(lineX)
turtle.left(90)
turtle.forward(lineY)
turtle.left(90)
turtle.forward(lineX)
turtle.left(90)
turtle.forward(lineY)
turtle.left(90)
turtle.end_fill()

def drawSquare(x,y,lineX,lineY,col):
turtle.penup()
turtle.setpos(x,y)
turtle.pendown()
turtle.pencolor(col)
turtle.begin_fill()
turtle.forward(lineX)
turtle.left(90)
turtle.forward(lineY)
turtle.left(90)
turtle.forward(lineX)
turtle.left(90)
turtle.forward(lineY)
turtle.left(90)

def drawChessBoard(width, height, numTilesX, numTilesY,pattern=0):
offsetToCornerX = (-width / 2)
offsetToCornerY = (-height / 2)
squareWidth = (width / numTilesX)
squareHeight = (height / numTilesY)
drawSquare(offsetToCornerX-1,offsetToCornerY-1,width+2,height+2,"black")
for y in range(numTilesY):
for x in range(numTilesX):

if(pattern == 0):
r = g = b = 0
if((x+y)%2==0):
r = g = b = 1

if(pattern == 1):
r = math.fabs(offsetToCornerX+(squareWidth*x)) / (width/2)
g = math.fabs(offsetToCornerY+(squareHeight*y)) / (height/2)
b = (x+y) / (numTilesX+numTilesY)

if(pattern == 2):
r = math.fabs(math.sin(x))
g = math.fabs(math.cos(y))
b = math.fabs(math.sin(x+y))

if(pattern == 3):
g = math.fabs(offsetToCornerX+(squareWidth*x)) / (width/2)
b = math.fabs(offsetToCornerY+(squareHeight*y)) / (height/2)
r = (x+y) / (numTilesX+numTilesY)

if(pattern == 4):
r = 0
g = (x+y) / (numTilesX+numTilesY)
b = 0

fillSquare(offsetToCornerX+(squareWidth*x),offsetToCornerY+(squareHeight*y),squareWidth,squareHeight,r,g,b)

turtle.penup()
turtle.setpos(offsetToCornerX,offsetToCornerY)
turtle.pendown()

#turtle.ht()
turtle.tracer(1000,0)

drawChessBoard(600,600,120,120,1)

turtle.update()
turtle.exitonclick()
```

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