Rectangle Edges as Lines

class Example extends Phaser.Scene
{
    create ()
    {
        const rect = new Phaser.Geom.Rectangle(0, 0, 800, 600);

        const graphics = this.add.graphics({ lineStyle: { width: 2, color: 0x0000aa } });

        let count = 0;
        const lines = [];

        while (rect.height > 5)
        {
            switch (count++ % 4)
            {
                case 0:
                    lines.push(rect.getLineA());
                    break;
                case 1:
                    lines.push(rect.getLineB());
                    break;
                case 2:
                    lines.push(rect.getLineC());
                    break;
                case 3:
                    lines.push(rect.getLineD());
                    break;
            }

            rect.width *= 0.95;
            rect.height *= 0.95;

            rect.centerX = 400;
            rect.centerY = 300;
        }

        for (let i = 0; i < lines.length - 1; i++)
        {
            const firstLine = lines[i];

            const secondLine = lines[i + 1];

            graphics.lineBetween(firstLine.x1, firstLine.y1, secondLine.x1, secondLine.y1);
            graphics.lineBetween(firstLine.x2, firstLine.y2, secondLine.x2, secondLine.y2);
        }
    }
}

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

const game = new Phaser.Game(config);