title: How to add motion to parallax layer without being effected by player moment? e.g cloud in back ground
body: <p>I'm working on 2D plaformer game which have three parallax layer (sky,mountains and cloud) sky and mountain layer moves according to motion scale property of parallax layer, and i have added a script to cloud layer so it keep moving in one direction i.e right to left even when player is idle or not moving.But i'm stuck with a problem that when the player moves or jumps, cloud also gets the jump effect and keeps following the player. How to make cloud move in one direction irrespective of player moment? 
  my cloud script:</p>
  
  <pre><code>extends ParallaxBackground
  
  var dst = 0
  
  func _ready():
      set_process(true)
      pass 
  
  func _process(delta):
      dst -= 50 *delta
      set_scroll_offset(Vector2(dst,0))
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/n3Oni.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/n3Oni.png" alt="this is image for reference"></a></p>