const app = new PIXI.Application({
  view: document.getElementById('main'),
  width: 500,
  height: 500,
  antialias: true,
  transparent: false,
  backgroundColor: 0x00CC99,
});

const container = new PIXI.Container();
app.stage.addChild(container);


let graphics = new PIXI.Graphics();
graphics.lineStyle(4, 0X00000, 1);
graphics.beginFill(0x000000);
graphics.drawRect(200, 200, 50, 50);
graphics.endFill();

container.addChild(graphics);

container.interactive = true;
container.buttonMode = true;
container.click = () => {
  alert('你點到我！');
};