#!/usr/bin/python
import matplotlib.pyplot as plt
import numpy as np

def f(t):
    x=np.random.rand(1)
    y=np.random.rand(1)
    return x,y

fig, pic = plt.subplots()
pic.set_xlim(0,1)
pic.set_ylim(0,1)
for t in range(20):
    x,y = f(t)
    # optionally clear axes and reset limits
#    plt.cla() 
#    pic.set_xlim(0,1)
#    pic.set_ylim(0,1)
    pic.plot(x, y, marker="s")
    pic.set_title(str(t))
    plt.draw()
    plt.pause(0.1)

plt.show()