Particle Property Interpolation

class Example extends Phaser.Scene
{
    preload ()
    {
        this.load.setBaseURL('https://cdn.phaserfiles.com/v410');
        this.load.image('red', 'assets/particles/red.png');
        this.load.image('green', 'assets/particles/green.png');
        this.load.image('blue', 'assets/particles/blue.png');
    }

    create ()
    {
        let i = 0;

        this.linear = this.add.particles(0, 100, 'red', {
            x: { values: [ 50, 500, 200, 800 ], interpolation: 'linear' },
            lifespan: 2500,
            gravityY: 120,
            speed: 16,
            scale: 0.65,
            blendMode: 'ADD'
        });

        this.bezier = this.add.particles(0, 100, 'green', {
            x: { values: [ 50, 500, 200, 800 ], interpolation: 'bezier' },
            lifespan: 2500,
            gravityY: 120,
            speed: 16,
            scale: 0.65,
            emitting: false,
            blendMode: 'ADD'
        });

        this.catmull = this.add.particles(0, 100, 'blue', {
            x: { values: [ 50, 500, 200, 800 ], interpolation: 'catmull' },
            lifespan: 2500,
            gravityY: 120,
            speed: 16,
            scale: 0.65,
            emitting: false,
            blendMode: 'ADD'
        });

        this.add.text(10, 10, 'Click to change interpolation type');

        const type = this.add.text(10, 40, 'x pos interpolation: linear');

        this.input.on('pointerdown', () => {

            i++;

            if (i === 1)
            {
                this.linear.emitting = false;
                this.bezier.emitting = true;
                type.setText('x pos interpolation: bezier');
            }
            else if (i === 2)
            {
                this.bezier.emitting = false;
                this.catmull.emitting = true;
                type.setText('x pos interpolation: catmull rom');
            }
            else if (i === 3)
            {
                this.catmull.emitting = false;
                this.linear.emitting = true;
                type.setText('x pos interpolation: linear');
                i = 0;
            }

        });
    }
}

const config = {
    scale: { mode: Phaser.Scale.FIT },
    type: Phaser.AUTO,
    width: 800,
    height: 600,
    backgroundColor: '#000',
    parent: 'game-container',
    scene: Example
};

const game = new Phaser.Game(config);