text: var config = {
      type: Phaser.WEBGL,
      width: 800,
      height: 600,
      backgroundColor: '#2d2d2d',
      parent: 'phaser-example',
      scene: {
          preload: preload,
          create: create
      }
  };
  
  var game = new Phaser.Game(config);
  
  function preload ()
  {
      this.load.image('block', 'assets/sprites/block.png');
  }
  
  function create ()
  {
      var marker = this.add.image(100, 300, 'block').setAlpha(0.3);
      var image = this.add.image(100, 300, 'block');
  
      this.tweens.add({
          targets: image,
          x: 700,
          duration: 3000,
          ease: 'Power2',
          repeat: 3,
          delay: 1000
      });
  }
  