var images = [
  'movieclip0.png',
  'movieclip1.png',
  'movieclip2.png',
  'movieclip3.png',
  'movieclip4.png',
  'movieclip5.png',
  'movieclip6.png',
  'movieclip7.png'
];

var textures = [];
for (var i = 0; i < images.length; i++) {
  textures.push(PIXI.Texture.fromFrame(images[i]));
}

var movieclip = new PIXI.extras.MovieClip(textures);
movieclip.animationSpeed = 0.8;
movieclip.gotoAndPlay(0);