Create-a-simple-web-AR-application.md

@@ -88,11 +88,11 @@ async function activateXR() {
 </html>
 ```
 
-# Initialize three.js
+## Initialize three.js
 Not much will happen when pressing the Start button. To set up a 3D environment, you can use a rendering library to display a scene.
 
 In this example, you will use three.js, a JavaScript 3D rendering library that provides a WebGL renderer. Three.js handles rendering, cameras, and scene graphs, making it easier to display 3D content on the web.
-## Create a scene
+### Create a scene
 A 3D environment is generally modelled as a scene. Create a THREE.Scene that contains AR elements. The following code allows you to look at an unlit colored box in AR.
 
 Add this code to the bottom of the **activateXR()** function:
@@ -115,7 +115,7 @@ cube.position.set(1, 1, 1);
 scene.add(cube);
 ```
 
-## Set up rendering using three.js
+### Set up rendering using three.js
 To be able to view this scene in AR, you'll need a renderer and a camera. The renderer uses WebGL to draw your scene to the screen. The camera describes the viewport from which the scene is viewed.
 
 Add this code to the bottom of the **activateXR()** function:
@@ -198,7 +198,7 @@ Navigate to the webpage you created from your device. You should be able to view
 The complete code can be downloaded [cube.html](uploads/ac0260539a69bb6d5e8c440ac33c353e/cube.html) and a live demo can be acceded [here](https://transfer.hft-stuttgart.de/pages/muhammad.alfakhori/ar/1-Cube.html).
 
 
-# **Tap to place **
+# **Tap to place**
 A common way of interacting with the AR world is through a **hit test**, which finds an intersection between a ray and real-world geometry. In Hello WebXR, you'll use a hit test to place a sunflower in the virtual world.
 
 ## Remove the demo cube