new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
              
  import math 
  import numpy as np
  import matplotlib.pyplot as plt
  from mpl_toolkits.mplot3d import axes3d
  
  
  mu = np.array([0., 0.])
  cov = np.array([[1., 0.], [0., 1.]])
  num_points = 10000
  
  x = np.random.multivariate_normal(mu, cov, num_points)
  
  plt.plot(x[:,0], x[:,1], ".")
  plt.show()
  
  
subject: Add a snippet (python/numpy/random/multivariate_normal).