from random import randint
from pylab import *

for i in range(10):
    x = 0.2+9.5*random()
    y = 0.2+9.5*random()
    a = 0.2+9.5*random()
    b = 0.2+9.5*random()
    plot(x, y, 'bo')
    plot(a, b, 'ro')

x = 0.2+9.5*random()
y = 0.2+9.5*random()
plot(x, y, 'go')

axis([0,10,0,10])
grid()          
show()