groups.coffee

class ChildrenFilter
  @byName: (children, name) ->
    $.grep(children, (child) ->
      return child.name == name
    )[0]

  @byNameOrCreate: (game, stage, children, name) ->
    byName = @byName(children, name)
    byName = if typeof byName == 'undefined' then false else byName

    if byName
      byName
    else
      new Phaser.Group(game, stage, name, true)

tweens.coffee

class CanvasTweens
  @starsBlink: (context, stars) ->
    stars.forEach((star) ->
      @game.add.tween(star).to({
        alpha: 0
      }, @game.rnd.integerInRange(600, 1500), null, true, @game.rnd.integerInRange(800, 1500), -1, true)
    , context)