import math
import turtle
import random

wn = turtle.Screen()
wn.bgcolor('lightyellow')

fred = turtle.Turtle()
fred.penup()
fred.speed(0)

for i in range(10000):
    x = random.randint(-300,300)
    y = random.randint(-300,300)
    fred.goto(x,y)
    if x*x + y*y <= 300*300:
        fred.dot("red")
    else:
        fred.dot("blue")