AtomicGameEngine-Examples/NewSpaceGame/Resources/Components/SpaceBackground.js

var game = Atomic.game;
var node = self.node;

node.scale2D = [1.5, 1.5];
node.position2D = [0, 12];

function start() {

  var spaceSprite = game.cache.getResource("Sprite2D", "Sprites/space_background.png");

  // add a sprite component to our node
  var sprite2D = node.createComponent("StaticSprite2D");

  sprite2D.orderInLayer = -200;
  sprite2D.blendMode = Atomic.BLEND_ADDALPHA;
  sprite2D.sprite = spaceSprite;

}

function update(timeStep) {

  if (node.position[1] < -19)
    node.position2D = [0, 18];

  var speed = .75;
  node.translate([0, -timeStep * speed, 0]);

}