title: Change the order in pygame.sprite.OrderedUpdates group
body: <p>In a platform game, in order to simulate the parallax movement of the clouds, when a new cloud is generated, it gets a speed that is proportional to its dimension.
  In other words, the bigger is the cloud, the faster it goes (because is closer to the point of view of the player).</p>
  
  <p>The problem is the drawing order. The last one to be drawn will overlap the others, no matter their if they are smaller (which should be farther from the viewer).</p>
  
  <p>The point is that I don't know how to dynamically change the order in a <strong>pygame.sprite.OrderedUpdates</strong> group (if it is possibile at all).
  There is a simple way to change the order or I have to create multiple clouds groups based on the dimensions?</p>