import sys, os, os.path
from pylab import *

seed=28995;


def randbit():
    global seed
    seed=seed<<1
    if(seed&2):
        seed=seed^1;
    if(seed&32768):
        seed=seed^1;
    return seed&1;

x=range(0,999)
y=range(0,999)
y[0]=0

for j in range(1,10):
    for i in range(1,999):
        y[i]=y[i-1]+randbit()*2-1
    plot(x,y)

for i in range(1,999):
    y[i]=sqrt(i)*3

plot(x,y)

for i in range(1,999):
    y[i]=-sqrt(i)*3

plot(x,y)

show()