text: # Exercise 5.11
  
  from Tkinter import *
  from random import *
  root = Tk()
  c = Canvas(root, width = 550, height = 400, bg = 'lightblue')
  c.pack()
  c.create_polygon((0,200), (550, 300), (550,400), (0,400), outline = '', fill = 'gray')
  c.create_oval(75, 83, 75 + 75, 83 + 75, fill = 'white', outline = '')
  c.create_oval(57, 146, 57 + 116, 146 + 116, fill = 'white', outline = '')
  for i in range(500):
      x = random() * 550
      y = random() * 400
      c.create_rectangle(x, y, x + 1, y + 1, fill = 'white', outline = 'white')
  root.mainloop()
  