JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://github.com/GoodBoyDigital/pixi.js/releases/download/v3.0.5/pixi.js"></script>

JavaScript

var renderer = PIXI.autoDetectRenderer(800,600, { antialias:true});
document.body.appendChild(renderer.view);
  
var stage = new PIXI.Container();

var maskedObjectConainer = new PIXI.Sprite();
stage.addChild(maskedObjectConainer);

var masksContainer = new PIXI.Sprite();
stage.addChild(masksContainer);

graphics = new PIXI.Graphics();
graphics.beginFill(0xffffff,1);
graphics.drawRect(0,0,200,200);
graphics.endFill();
maskedObjectConainer.addChild(graphics);

var graphics;
	graphics = new PIXI.Graphics();
  graphics.beginFill(0xff0000,1);
for(var i = 0; i < 5; i++){
  graphics.drawRect(i*30,0,25,25);
}
  graphics.endFill();
  masksContainer.addChild(graphics);

maskedObjectConainer.mask = graphics 

animate();
function animate() {
    renderer.render(stage);
    requestAnimationFrame(animate);
}