var game = new Phaser.Game(800, 600, Phaser.AUTO, 'phaser-example', { preload: preload, create: create });

function preload() {

    //  Here we load the Starling Texture Atlas and XML file
    game.load.atlasXML('octopus', 'assets/sprites/octopus.png', 'assets/sprites/octopus.xml');

}

function create() {

    //  A more suitable underwater background color
    game.stage.backgroundColor = '#1873CE';

    //  Create our octopus
    var octopus = game.add.sprite(300, 200, 'octopus');

    //  Create an animation called 'swim', the fact we don't specify any frames means it will use all frames in the atlas
    octopus.animations.add('swim');

    //  Play the animation at 30fps on a loop
    octopus.animations.play('swim', 30, true);

    //  Bob the octopus up and down with a tween
    game.add.tween(octopus).to({ y: 300 }, 2000, Phaser.Easing.Quadratic.InOut, true, 0, 1000, true);

}