from turtle import speed, goto
from math import cos, sin, pi

def c(n):
    speed('fastest')
    for i in range(n):
        goto(200*cos(2*pi*i/n), 200*sin(2*pi*i/n))
        goto(200*cos(2*pi*((2*i)%n)/n), 200*sin(2*pi*((2*i)%n)/n))

c(100)