title: How can I animate a point moving around the circumference of a circle?
body: <p>With this code, how would it be possible to animate a point to trace the circle?</p>
  
  <pre><code>import numpy as np
  import matplotlib.pyplot as plt
  
  x = np.linspace(-1.0, 1.0, 100)
  y = np.linspace(-1.0, 1.0, 100)
  X, Y = np.meshgrid(x,y)
  F = X**2 + Y**2 - 0.6
  plt.contour(X,Y,F,[0])
  plt.gca().set_aspect('equal')
  plt.show()
  </code></pre>
  
  <p>I need it to look something like <a href="https://www.youtube.com/watch?v=bEnET3MO0Sw" rel="nofollow noreferrer">this</a>. (Sorry I couldn't find a better animation describing what I wanted) The point I'm describing would be the center point of the circle that the moon is rotating around.</p>