Stagger Play 2

var config = {
    type: Phaser.AUTO,
    parent: 'phaser-example',
    pixelArt: true,
    width: 800,
    height: 600,
    scene: {
        preload: preload,
        create: create
    }
};

var game = new Phaser.Game(config);

function preload ()
{
    this.load.atlas('lazer', 'assets/animations/lazer/lazer.png', 'assets/animations/lazer/lazer.json');
}

function create ()
{
    this.anims.create({ key: 'blast', frames: this.anims.generateFrameNames('lazer', { prefix: 'lazer_', start: 0, end: 22, zeroPad: 2 }), repeat: -1 });

    var group = this.add.group();

    group.createMultiple({ key: 'lazer', frame: 'lazer_22', repeat: 39, setScale: { x: 0.25, y: 0.25 } });

    Phaser.Actions.GridAlign(group.getChildren(), {
        width: 20,
        height: 2,
        cellWidth: 32,
        cellHeight: 280,
        x: -50,
        y: -220
    });

    this.anims.staggerPlay('blast', group.getChildren(), 20);
}