#!-/usr/bin/python

from math import *
import numpy
import scipy
import time

x_n = 0
initial = 1
maxsteps = 100
test2 = 0b0001

def lfsr(seed, taps):
    
    x_n = seed
    x_n1 = x_n & 0b0001
    x_n4 = x_n & 0b1000
    x_nsum = (x_n1 + x_n4)%2

    return x_n + x_nsum

while(1):
	print test2
	test2 = lfsr(test2 , [1,0,1])
	print bin(test2)
	time.sleep(0.5)