genera e imprime 4 polígonos dentro de un mapa de tamaño de 30x30

from matplotlib import pyplot as plt 
from shapely.geometry import Polygon 
from descartes import PolygonPatch 
import matplotlib.patches as mpatches

def create_polygons(n): 
    poly_li = [] 
    for i in range(n): 
        poly_li.append(Polygon([(random.randrange(1, 30),  
                                 random.randrange(1, 30)), 
                                (random.randrange(1, 30),  
                                 random.randrange(1, 30)), 
                                (random.randrange(1, 30),  
                                 random.randrange(1, 30))])) 
    return poly_li 

def plot_polygons(polygons): 
    fig = plt.figure(num=None, figsize=(7, 7), dpi=80) 
    ax = fig.add_subplot(111)  
    for poly in polygons: 
        patch = PolygonPatch(poly, fc='