## A Brief Tour of dyna3

When you load dyna3, you should initially see a three-dimensional coordinate system with labeled axes.
```javascript

    import {threeLoaded, three as J3} from './externals.js'

    main = () ->
       renderer = new J3.WebGLRenderer()
       rwd = window.innerWidth
       rht = window.innerHeight
       renderer.setSize(rwd, rht)
       document.body.appendChild renderer.domElement

       scene = new J3.Scene()
       geometry = new J3.SphereBufferGeometry(1, 5, 5)
       material = new J3.MeshBasicMaterial( {color: 0x0000ff} )
       ball = new J3.Mesh(geometry, material)
       scene.add ball

       camera = new J3.PerspectiveCamera(75, rwd/rht, 0.1, 1000)
       camera.position.z = 5

       renderer.render(scene, camera)

    threeLoaded.then(main)
```