preload ()
{
this.load.image('orb', 'assets/sprites/orb-blue.png');
}
create ()
{
// Create 300 sprites (they all start life at 0x0)
const group = this.add.group({ key: 'orb', frameQuantity: 300 });
const circle = new Phaser.Geom.Circle(400, 300, 130);
// Randomly position the sprites within the circle
Phaser.Actions.RandomCircle(group.getChildren(), circle);
}