JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://threejs.org/build/three.min.js"></script>
<script src="http://threejs.org/examples/js/controls/OrbitControls.js"></script>

CSS

body {
	background-color: #000;
	margin: 0px;
	overflow: hidden;
}

JavaScript

// TubeGeometry in the shape of an ellipse

// Ellipse class, which extends the virtual base class Curve
class Ellipse extends THREE.Curve {

	constructor( xRadius, yRadius ) {

		super();

		// add radius as a property
		this.xRadius = xRadius;
		this.yRadius = yRadius;


	}

	getPoint( t, optionalTarget = new THREE.Vector3() ) {

		const point = optionalTarget;
		var radians = 2 * Math.PI * t;

		return new THREE.Vector3( this.xRadius * Math.cos( radians ),
							  	this.yRadius * Math.sin( radians ),
							  	0 );


	}

}

//

var mesh, renderer, scene, camera, controls;

init();
render();

function init() {

    // renderer
    renderer = new THREE.WebGLRenderer();
    renderer.setSize( window.innerWidth, window.innerHeight );
    document.body.appendChild( renderer.domElement );

    // scene
    scene = new THREE.Scene();
    
    // camera
    camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 1000 );
    camera.position.set( 20, 20, 20 );

    // controls
    controls = new THREE.OrbitControls( camera, renderer.domElement );
    controls.addEventListener( 'change', render ); // use if there is no animation loop
    controls.minDistance = 10;
    controls.maxDistance = 50;
    
    // light
    var light = new THREE.PointLight( 0xffffff, 0.7 );
    camera.add( light );
    scene.add( camera ); // add to scene only because the camera  has a child
    
    // axes
    scene.add( new THREE.AxesHelper( 20 ) );

    // path
    var path = new Ellipse( 5, 10 );

    // params
    var pathSegments = 64;
    var tubeRadius = 0.5;
    var radiusSegments = 16;
    var closed = true;

    var geometry = new THREE.TubeBufferGeometry( path, pathSegments, tubeRadius, radiusSegments, closed );
    
    // material
    var material = new THREE.MeshPhongMaterial( {
        color: 0x0080ff, 
    } );
    
    // mesh
    mesh = new THREE.Mesh( geometry, material );
    scene.add( mesh );
    
}

function render() {

    renderer.render(...