add three.js test scene

static/scripts/main.js

@@ -0,0 +1,25 @@
+import * as THREE from 'three';
+
+const scene = new THREE.Scene();
+const camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 0.1, 1000 );
+
+const renderer = new THREE.WebGLRenderer();
+renderer.setSize( window.innerWidth, window.innerHeight );
+renderer.setAnimationLoop( animate );
+document.body.appendChild( renderer.domElement );
+
+const geometry = new THREE.BoxGeometry( 1, 1, 1 );
+const material = new THREE.MeshBasicMaterial( { color: 0x00ff00 } );
+const cube = new THREE.Mesh( geometry, material );
+scene.add( cube );
+
+camera.position.z = 5;
+
+function animate( time ) {
+
+  cube.rotation.x = time / 2000;
+  cube.rotation.y = time / 1000;
+
+  renderer.render( scene, camera );
+
+}