from math import *
from pylab import *

def Spirale(N):
    for k in range (0,N):
        x1=sqrt(2)/(k+1)*cos(k*pi/2)
        y1=sqrt(2)/(k+1)*sin(k*pi/2)
        x2=sqrt(2)/(k+2)*cos((k+1)*pi/2)
        y2=sqrt(2)/(k+2)*sin((k+1)*pi/2)
        a=[x1,x2]
        b=[y1,y2]
        plot(a,b,'green')
    show()
    return