Hang up! You need to first enable WebGL first

WebGL is a new technology that makes it possible to render 3D graphics in realtime. Your web browser, Safari, supports WebGL but it is not yet enabled. If you want you can try using Chrome or Firefox, or you can follow the screenshots below to enable WebGL in three steps:

1. Open Preferences

Safari1

2. Enable the Develop Menu

Safari2

3. Enable WebGL

Safari3

4. You're done!