Follow Sprite with Deadzone

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

    preload ()
    {
        this.load.setBaseURL('https://cdn.phaserfiles.com/v410');
        // this.load.image('bg', 'assets/pics/the-end-by-iloe-and-made.jpg');
        this.load.image('bg', 'assets/pics/uv-grid-diag.png');
        this.load.image('block', 'assets/sprites/block.png');
        this.moveCam = false;
    }

    create ()
    {
        //  Set the camera and physics bounds to be the size of 4x4 bg images
        // this.cameras.main.setBounds(0, 0, 1920 * 2, 1080 * 2);
        // this.cameras.main.setBounds(0, 0, 1024 * 4, 1024 * 4);
        // this.physics.world.setBounds(0, 0, 1920 * 2, 1080 * 2);

        //  Mash 4 images together to create our background
        // this.add.image(0, 0, 'bg').setOrigin(0);
        // this.add.image(1920, 0, 'bg').setOrigin(0).setFlipX(true);
        // this.add.image(0, 1080, 'bg').setOrigin(0).setFlipY(true);
        // this.add.image(1920, 1080, 'bg').setOrigin(0).setFlipX(true).setFlipY(true);

        this.cameras.main.setBounds(0, 0, 1024 * 4, 1024 * 4);

        for (let y = 0; y < 4; y++)
        {
            for (let x = 0; x < 4; x++)
            {
                this.add.image(1024 * x, 1024 * y, 'bg').setOrigin(0).setAlpha(0.75);
            }
        }

        this.cursors = this.input.keyboard.createCursorKeys();

        // player = this.physics.add.image(1920, 1080, 'block');
        // player = this.physics.add.image(1024, 1024, 'block');
        // player = this.physics.add.image(10, 10, 'block');
        this.player = this.physics.add.image(1024, 1024, 'block');

        // player.setCollideWorldBounds(true);

        // this.cameras.main.setZoom(0.5);
        // this.cameras.main.setDeadzone(400, 200);

        this.cameras.main.startFollow(this.player, true);
        // this.cameras.main.startFollow(player, true, 0.1, 0.1);

        this.cameras.main.setDeadzone(400, 200);
        this.cameras.main.setZoom(0.5);

        this.input.on('pointerdown', function () {
            this.moveCam = (this.moveCam) ? false: true;
        }, this);

        if (this.cameras.main.deadzone)
        {
            const graphics = this.add.graphics().setScrollFactor(0);
            graphics.lineStyle(2, 0x00ff00, 1);
            graphics.strokeRect(200, 200, this.cameras.main.deadzone.width, this.cameras.main.deadzone.height);
        }

        this.text = this.add.text(32, 32).setScrollFactor(0).setFontSize(64).setColor('#ffffff');
    }

    update ()
    {
        const cam = this.cameras.main;

        if (cam.deadzone)
        {
            this.text.setText([
                'Cam Control: ' + this.moveCam,
                'ScrollX: ' + cam.scrollX,
                'ScrollY: ' + cam.scrollY,
                'MidX: ' + cam.midPoint.x,
                'MidY: ' + cam.midPoint.y,
                'deadzone left: ' + cam.deadzone.left,
                'deadzone right: ' + cam.deadzone.right,
                'deadzone top: ' + cam.deadzone.top,
                'deadzone bottom: ' + cam.deadzone.bottom
            ]);
        }
        else if (cam._tb)
        {
            this.text.setText([
                'Cam Control: ' + this.moveCam,
                'ScrollX: ' + cam.scrollX,
                'ScrollY: ' + cam.scrollY,
                'MidX: ' + cam.midPoint.x,
                'MidY: ' + cam.midPoint.y,
                'tb x: ' + cam._tb.x,
                'tb y: ' + cam._tb.y,
                'tb right: ' + cam._tb.right,
                'tb bottom: ' + cam._tb.bottom
            ]);
        }

        this.player.setVelocity(0);

        if (this.moveCam)
        {
            if (this.cursors.left.isDown)
            {
                cam.scrollX -= 4;
            }
            else if (this.cursors.right.isDown)
            {
                cam.scrollX += 4;
            }

            if (this.cursors.up.isDown)
            {
                cam.scrollY -= 4;
            }
            else if (this.cursors.down.isDown)
            {
                cam.scrollY += 4;
            }
        }
        else
        {
            if (this.cursors.left.isDown)
            {
                this.player.setVelocityX(-800);
            }
            else if (this.cursors.right.isDown)
            {
                this.player.setVelocityX(800);
            }

            if (this.cursors.up.isDown)
            {
                this.player.setVelocityY(-800);
            }
            else if (this.cursors.down.isDown)
            {
                this.player.setVelocityY(800);
            }
        }
    }
}

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

const game = new Phaser.Game(config);