import matplotlib.pyplot as plt
import matplotlib.patches as patches
import numpy as np
import pylab
from random import randint

def arsplot(rho,phi,wid,height):

    for i in range(len(rho)):

        phi[i]=phi[i]+randint(0,9)
        rho[i]=rho[i]+randint(-5,5)
        ax1.add_patch(patches.Rectangle((rho[i],phi[i]),wid[i],height[i]))


rho=[12, 16, 18, 4, 11, 6, 17]
phi=[12,16,18,4,11,6,17]
wid=[2,2,2,2,2,2,2]
height=[1,1,1,1,1,1,1]

fig1=plt.figure(figsize=(15,32))
ax1=fig1.add_subplot(111, aspect='equal')
plt.grid(True)
pylab.xlim([-25,45])
pylab.ylim([-15,55])

while True:

    arsplot(rho,phi,wid,height) #function call

    plt.show()