Camera Fade In and Out

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

    preload ()
    {
        this.load.setBaseURL('https://cdn.phaserfiles.com/v410');
        this.load.image('robota', 'assets/pics/robota-uxo-by-made-of-bomb.jpg');
    }

    create ()
    {
        const image = this.add.image(900, 300, 'robota');

        this.tweens.add({
            targets: image,
            x: 100,
            ease: 'Sine.easeInOut',
            yoyo: true,
            repeat: -1,
            duration: 3000
        });

        this.cameras.main.once('camerafadeincomplete', function (camera) {
            camera.fadeOut(6000);
        });

        this.cameras.main.fadeIn(6000);
    }
}

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

const game = new Phaser.Game(config);