Animation from Multiple Atlases

class Example extends Phaser.Scene
{
    constructor ()
    {
        super();
        this.data = {};
    }

    init() {
        this.data = {
            r: -0.05,
            s: -0.0012,
            sx: 0.25,
            x: 400,
            y: 100
        };
    }

    preload ()
    {
        this.load.setBaseURL('https://cdn.phaserfiles.com/v410');
        this.load.setPath('assets/animations/');

        this.load.atlas('sao0');
        this.load.atlas('sao1');
    }

    create ()
    {
        //  Our animation consists of 50 frames split across 2 texture atlases:

        //  sao0 contains frames: 0, 1, 4, 7, 8, 9, 10, 11, 16, 17, 18, 19, 23, 24, 25, 26, 30, 31, 32, 33, 38, 39, 40, 45, 46, 47, 48
        //  sao1 contains frames: 2, 3, 5, 6, 12, 13, 14, 20, 21, 22, 27, 28, 29, 34, 35, 36, 37, 41, 42, 43, 44, 49, 50

        //  Let's create an array to hold them all:
        var frames = [];

        const sao0 = [ 0, 1, 4, 7, 8, 9, 10, 11, 16, 17, 18, 19, 23, 24, 25, 26, 30, 31, 32, 33, 38, 39, 40, 45, 46, 47, 48 ];
        const sao1 = [ 2, 3, 5, 6, 12, 13, 14, 20, 21, 22, 27, 28, 29, 34, 35, 36, 37, 41, 42, 43, 44, 49, 50 ];

        //  And insert the frames into the array:
        for (var i = 0; i <= 50; i++)
        {
            if (sao0.indexOf(i) > -1)
            {
                frames.push({ key: 'sao0', frame: i.toString() });
            }
            else
            {
                frames.push({ key: 'sao1', frame: i.toString() });
            }
        }

        //  All the 'frames' array needs are objects that contain the key of the texture and the 'frame'
        //  property, which is the name of our frame within the atlas (in this case they're just numbers)

        this.anims.create({
            key: 'swish',
            frames: frames,
            repeat: -1
        });

        this.group = this.add.group();

        this.group.createMultiple({ key: 'sao', repeat: 10, setXY: { x: 400, y: 300 }, setAlpha: { value: 0, step: 0.05 } });

        this.group.playAnimation('swish');

        this.tweens.add({
            targets: this.data,
            duration: 3000,
            ease: 'Sine.easeInOut',
            yoyo: true,
            repeat: -1,
            props: {
                r: {
                    value: 0.05
                },
                s: {
                    value: 0.0012
                },
                sx: {
                    value: 2.5
                },
                y: {
                    value: 400,
                    duration: 4000
                }
            }
        });
    }

    update ()
    {
        const children = this.group.getChildren();

        Phaser.Actions.Rotate(children, this.data.r, this.data.s);
        Phaser.Actions.SetScale(children, this.data.sx, this.data.sx, this.data.s, this.data.s);
        Phaser.Actions.SetXY(children, this.data.x, this.data.y, this.data.s, this.data.s);
    }
}

const config = {
    scale: { mode: Phaser.Scale.FIT },
    type: Phaser.AUTO,
    parent: 'game-container',
    width: 800,
    height: 600,
    pixelArt: true,
    scene: Example
};

const game = new Phaser.Game(config);