JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//cdn.rawgit.com/mrdoob/three.js/master/build/three.js"></script>

CSS

body {
	  margin: 0;
}

JavaScript

var camera, scene, renderer, material2;

init();
animate();

function init() {

    camera = camera = new THREE.OrthographicCamera( - 1, 1, 1, - 1, 0, 1 );

    scene = new THREE.Scene();

   	var geometry = new THREE.PlaneBufferGeometry( 2, 2 );
    var material1 = new THREE.MeshBasicMaterial( { color: 0x00ff00 } );
    material2 = new THREE.MeshBasicMaterial( { 
    		color: 0x0000ff, 
        blending: THREE.AdditiveBlending,
        transparent: true,
        opacity: 0
    } );

   	var mesh1 = new THREE.Mesh( geometry, material1 );
    var mesh2 = new THREE.Mesh( geometry, material2 );
    mesh2.position.x = 1;
    
    
    scene.add( mesh1 );
    scene.add( mesh2 );

    renderer = new THREE.WebGLRenderer( { antialias: true } );
    renderer.setPixelRatio( window.devicePixelRatio );
    renderer.setSize( window.innerWidth, window.innerHeight );
    document.body.appendChild( renderer.domElement );
    
    //
    
    window.addEventListener( 'resize', onWindowResize, false );

}

function onWindowResize() {

		renderer.setSize( window.innerWidth, window.innerHeight );
  
}

var t = 0;

function animate() {

    requestAnimationFrame( animate );
    
    t += 0.02;
    
    material2.opacity = Math.abs( Math.sin( t ) );
    
    renderer.render( scene, camera );

}