title: SpriteKit conveyor belt
body: <p>I am trying to create a conveyor belt effect using SpriteKit like so </p>
  
  <p><img src="https://i.imgur.com/v3M7BdL.png?1" alt="Screenshot"></p>
  
  <p>MY first reflex would be to create a conveyor belt image bigger than the screen and then move it repeatedly forever with actions. But this does not seem ok because it is dependent on the screen size. </p>
  
  <p>Is there any better way to do this ? </p>
  
  <p>Also obviously I want to put things (which would move independently) on the conveyor belt so the node is an SKNode with a the child sprite node that is moving.</p>
  
  <p>Update : I would like the conveyor belt to move "visually"; so the lines move in a direction giving the impression of movement. </p>