let scene = new THREE.Scene()

let sceneWidth = window.innerWidth

let sceneHeight = window.innerHeight

let camera = this.camera = new THREE.PerspectiveCamera(

      75, sceneWidth / sceneHeight, 0.1, 1000

    )

​

let renderer = this.renderer = window.WebGLRenderingContext ?

                new THREE.WebGLRenderer() : new THREE.CanvasRenderer()

​

renderer.setSize(sceneWidth, sceneHeight)

renderer.setClearColor(new THREE.Color('rgb(100, 100, 100)'))

​

​

let material = new THREE.MeshBasicMaterial({

  color: 0xFFF000,

  wireframe: true

})

​

let cube = new THREE.Mesh(

    new THREE.CubeGeometry(3, 3, 3), material

  )

​

scene.add(cube)

​

​

camera.position.x = 5

camera.position.y = 5

camera.position.z = 5

camera.lookAt(scene.position)

document.body.appendChild(renderer.domElement)

renderer.render(scene, camera)