circle.js

var game = new Phaser.Game(800, 600, Phaser.AUTO, 'phaser-example', { create: create });

function create() {

    var graphics = game.add.graphics(0, 0);

    // graphics.lineStyle(2, 0xffd900, 1);

    graphics.beginFill(0xFF0000, 1);
    graphics.drawCircle(300, 300, 100);

}