title: How to add SKNode on the first layer SWIFT
body: <p>I'm trying to add a SKShapeNode on the scene, but if I use this:</p>
  
  <pre><code>let rect = SKShapeNode(SKShapeNode(rect: CGRectMake(0, 0, 100, 100)))
  self.addChild(rect)
  </code></pre>
  
  <p>This rectangle is added on the last layer and overlaps other nodes. So, how to add it on the first level?</p>
  
  <p>Thanks in advance</p>