JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://pixijs.download/v4.5.2/pixi.min.js"></script>

JavaScript

var app = new PIXI.Application(window.innerWidth, window.innerHeight);
document.body.appendChild(app.view);
var stage = app.stage;

var graphic = new PIXI.Graphics();
graphic.beginFill(0xffffff);
graphic.drawCircle(0, 0, 50);
graphic.endFill();
var circleBaseTex = graphic.generateCanvasTexture(1).baseTexture;
var circleTex = new PIXI.Texture(circleBaseTex);

PIXI.loader.add("https://pixijs.github.io/examples/required/assets/bkg-grass.jpg")
PIXI.loader.add("https://pixijs.github.io/examples/required/assets/BGrotate.jpg")
PIXI.loader.load(setup);

function setup()
{
	var bgImage = PIXI.loader.resources["https://pixijs.github.io/examples/required/assets/bkg-grass.jpg"].texture;
  var bgGraphic = new PIXI.Sprite(bgImage);
  stage.addChild(bgGraphic)
        
  var container = new PIXI.Sprite();
  stage.addChild(container);
  
  var imageToRevealImg = PIXI.loader.resources["https://pixijs.github.io/examples/required/assets/BGrotate.jpg"].texture;
  var imageToReveal = new PIXI.Sprite(imageToRevealImg)
  container.addChild(imageToReveal)

  var renderTexture = PIXI.RenderTexture.create(imageToReveal.width, imageToReveal.height);
  var graphic = new PIXI.Graphics();
  graphic.beginFill(0);
  graphic.drawRect(0, 0, renderTexture.width, renderTexture.height)
  graphic.endFill();
 	//app.renderer.render(graphic, renderTexture);
  
 	var renderTextureSprite = new PIXI.Sprite(renderTexture);
  container.addChild(renderTextureSprite);
 	//renderTextureSprite.blendMode = PIXI.BLEND_MODES.MULTIPLY;
  container.mask = renderTextureSprite;
	
  app.view.addEventListener('pointerdown', mouseDown);

  function mouseDown(event) {
    var mouseX = event.clientX;
    var mouseY = event.clientY;

    var dot = new PIXI.Sprite(circleTex);
    dot.x = mouseX;
    dot.y = mouseY;
    dot.anchor.set(.5)
				    
    app.renderer.render(dot, renderTexture, false, null, false);
    renderTextureSprite.texture = renderTexture;
  }
}